Hardware :: Boot With Two Identical Drives?
Sep 3, 2010
How do I boot with two identical drives? I have two identical Western Digital WD6400AAKS SATA-II 7200 rpm 640 GB hard drives. One of the drives is an internal drive on one machine. The second is available with a mobile drive bay. I can't boot the system with both drives installed. The kernel boots fine but then halts when handing off to init. The error message is:
Warning: unable to open an initial console
...
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
I can place the mobile drive in a different system that does not have the same drive installed and that system will boot fine from either drive. I'm reasonably certain the problem is caused by the two drives being so identical. I suspect the problem is the kernel cannot distinguish the difference. The model numbers are identical. No, I don't have other SATA drives to use. I am not using raid. The BIOS is not configured to use raid. How do I boot with two identical drives?
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Jan 12, 2010
I have two identical 73 GB Scsi ulta320 scsi drives, Fedora web server is install on one drive with all web files and etc. I wish to make an exact clone of the drive that will boot and run everything as the current drive does now. Is there a download of a program I could download or purchase that would boot and make an exact clone to do the above.
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Jul 7, 2011
I have two servers (A and B) which are identical. My idea was to have a software RAID 1 with both of them running and if server A craps out I wanted to swap the hard drives from server B into server A. When I tried to test this idea the network driver doesn't seem to want to cooperate. ifconfig gives nothing and I can't figure out why. From googling I've read that a network card has a unique ID on it (I'm assuming their talking about the MAC address) and is used in some config files which is why swapping hard drives gives two different MAC addresses and confuses the system. If that is so would anyone know exactly what config files the mac address is stored/used in? That way I can make a backup of those files and swap those out if I ever need to swap out the hard drives.
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Jan 25, 2011
I've got 4 identical 1 TB drives and would like to use them in a software RAID configuration on my home server. I'm running Debian Linux using 'mdadm' utility to manage the software RAID. I don't know how much I've read is fact or dated or even false so I decided I would ask here to get help from people who know more about this than I do. This is essentially just a file server machine to store all my data so being that I've got four identical SATA hard drives, I was thinking about doing RAID level 5. I guess I'll start here and ask if that is the recommended level of RAID. I think RAID level 5 will be fine for my general server usage. My second issue is partitioning the four individual drives to get maximum performance / space from them. Basically just asking here how would you or you recommend I partition the drives? I was thinking about doing three seperate partitions per drive:
/dev/sda1 = 4 GB (swap)/dev/sda2 = 1 GB (/boot)/dev/sda3 = 995 GB (/)Now from that partition schema above, obviously all the types will be 'fd' for RAID and the partition for /boot is going to be bootable. My confusion is that I read Grub doesn't support booting from RAID 5 since Grub can't handle disk assembly. If /dev/sdx2 (sda2, sdb2, sdc2, sdd2) are partitioned for /boot (bootable), how would you guys configure this RAID to match up equally? I don't think I do a RAID level 1 on 4 identical partitions, right?
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Jan 3, 2016
I have a Jessie with grub2. I've bought ssd and copied root partition onto it. I've also installed grub on this disc. I would like to have dual boot:
- First option: old root booted from hdd
- second option: boot from copied ssd and use root from it.
So i would have two identical but independent configurations.
Both disc has different uids (changed after cloning).
I had a hope that i will change fstab to mount root partition from ssd, but it doesn't work. I need to change grub configuration, but how to add new position?
There is also problem that bios doesn't allow me to choose disc to boot from. So i would rather prefer to change grub configuration for dual boot from different disc.
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Nov 1, 2010
I am new to Linux. When I installed some applications and something through package manager,Now I get two added options in boot loader with identical names like failsafe and normal. what is that?multiple kernel?
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May 1, 2011
I've used it once before but got fed up with the boot asking me everytime I turned my laptop on because I wasn't using it enough. I have Windows 7 on drive C . I want to keep it on drive C. I have several 1.5TB+ drives, and one of them is not being used. I want to dedicate it to Ubuntu, and be able to do a dual boot with my Windows 7 install. Is this possible? If it is, what about when this drive is not connected to my laptop? Will that mess up the boot process?
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Mar 26, 2011
I just successfully installed ubuntu 10.10 Meerkat Maverik parallel to manufacturer installed Windows 7 Professional on a newly bought ThinkPad t410. All works find just that on the boot screen instead of 1 Windows partition (usually something like "Windows 7 loader on sda1") I find two Windows partitions. Now, I know that Thinkpads have a recovery partition. Funny is though that both "Windows 7 loader on sda1/2" login to what seems the identical Windows (not one of them the "normal" and the other some form of a recovery).
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Dec 10, 2010
recently sent up another computer as follows:Two sata drives. Windows 7 was installed on the first drive(sda)and booted successfully. This drive was disconnected ( I have had some installs where Unbuntu wipes out the existing C drive eventhough I am installing to D) and Ubuntu was installed to the second drive (sdb). At one point I had to rebuild the grup on the Ubuntu drive and was careful to make it installed on the Ubuntu drive. To my surprise when the PC booted up I saw the Grub menu with a menu entry for Windows. The Windows drive was always the primary drive before the Ubuntu install. I was planning on the Windows drive being the boot drive and using a boot manager to determine where to go from there. If I utilize the BIOS boot option (F12) I can boot each drive individually. I cannot in BIOS set a particular drive to boot - just a hard drive. Everything is working I am just curious why the primary drive does not boot first. IN BIOS the Windows drive is a primary SATA with a lower number that the Ubuntu drive which is listed as a secondary drive.
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Feb 15, 2011
I can only use the Live CD to operate Ubuntu. After typing in the command sudo fdisk -l, I get the following?
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
[Code]....
And when I boot without the Live CD, I get the following message in the GNU GRUB Version 1.98-1ubuntu7 window page.
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Aug 10, 2010
I have a Centos 5.5 system with 2* 250 gig sata physical drives, sda and sdb. Each drive has a linux raid boot partition and a Linux raid LVM partition. Both pairs of partitions are set up with raid 1 mirroring. I want to add more data capacity - and I propose to add a second pair of physical drives - this time 1.5 terabyte drives presumably sdc and sdd. I assume I can just plug in the new hardware - reboot the system and set up the new partitions, raid arrays and LVMs on the live system. My first question:
1) Is there any danger - that adding these drives to arbitrary sata ports on the motherboard will cause the re-enumeration of the "sdx" series in such a way that the system will get confused about where to find the existing raid components and/or the boot or root file-systems? If anyone can point me to a tutorial on how the enumeration of the "sdx" sequence works and how the system finds the raid arrays and root file-system at boot time
2) I intend to use the majority of the new raid array as an LVM "Data Volume" to isolate "data" from "system" files for backup and maintenance purposes. Is there any merit in creating "alternate" boot partitions and "alternate" root file-systems on the new drives so that the system can be backed up there periodically? The intent here is to boot from the newer partition in the event of a corruption or other failure of the current boot or root file-system. If this is a good idea - how would the system know where to find the root file-system if the original one gets corrupted. i.e. At boot time - how does the system know what root file-system to use and where to find it?
3) If I create new LVM /raid partitions on the new drives - should the new LVM be part of the same "volgroup" - or would it be better to make it a separate "volgroup"? What are the issues to consider in making that decision?
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Sep 29, 2010
I have discovered that I have two partitions, on separate hdd's with identical UUID's, and the system switches back and forth erratically on restarts between the two different partitions, giving me the current /home or the /home of two months ago when I did the upgrade.
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Apr 29, 2010
I have RC now, downloaded a week ago. Thinking of re-installing the final one when it's out (very soon!) will there be any difference?
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Feb 25, 2011
i have an sql table with 2 columns i run a script that randomly selects a word from the table in column 1.
the word is displayed on the screen and I guess what it means i concatenate the randomly selected word and the answer the script looks for a match in mysql if it finds a match it says "Good job!" if there is no match it will say "not correct". However when i get it right it says not correct even though when i echo the variables they look exactly the same. the script below:
#!/bin/bash
var=$(mysql translator -u root --password=*-N<<EOF
SELECT word FROM tagalog ORDER BY RAND() LIMIT 1
EOF
)
[Code]....
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Jul 27, 2010
I am running Ubuntu 9.10 with Windows XP, installed from the live CD via WUBI. I believe that GRUB is 1.97~.
Everyting was working just fine until after applying some of the upgrades in the upgrade manager; now Ubuntu will not boot. Instead, it starts up the GRUB console with an error message saying that it can't find the kernel.
If you type ls, you see the following:
Code:
>ls
(loop0) (hd0) (hd0,1)
(loop0) is the Ubuntu loopback drive, (hd0,1) is the Windows drive (the real hard drive) and they are intact. I am able to set the root to (loop0) and you can see the files. But the hard drive and the loopback drive do not appear in /dev, so you can't mount them. To be precise, there are no devices beginning with "sd" listed in /dev.
I am able to boot the computer from the live CD, which automatically mounts the hard drive; from the live CD, I can mount the loopback drive thus.
Code:
> sudo mkdir /media/wubi
> sudo mount -o loop /media/8834C7D034C7C004/ubuntu/disks/root.disk /media/wubi
So they are not broken.
How can I make the drives appear in /dev when booting from GRUB?
(BTW, Windows XP broke during an upgrade a month ago, and it won't boot, either. I will try to fix that now that I have saved my files from the computer through Ubuntu.)
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Jul 22, 2011
I have ubuntu 11.04 installed on a 80gb hard drive and everything was running fine. I then installed a second drive (1gb) for storage. It worked fine after a reboot but now it won't boot. I'm pretty sure it's just confused as to which drive is the boot drive. I'm not sure as to how to fix it in GRUB2.
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Jul 15, 2010
I have a Dell Dimension 3000, pretty boring. I've got 3 hard drives installed. One drive (C) has XP loaded onto it, one drive has Fedora 13, and one drive has all of my media and photography work on it.
I installed Fedora to play around with Linux, but now after a while, I've decided that I want to use it as my default OS. I haven't booted into Windows in who knows how long. The problem is, that when I boot the computer, it defaults to XP. The only way to get into Fedora is to press F12 at the proper time to select which drive I want to boot from. This is a hassle at times, because I have a tendency to forget and not hit F12 quick enough and have to start over.
Unfortunately, I'm not sure which bootloader I'm using, however I believe it is the XP boot.ini file, if I'm explaining this right. I tried modifying the boot.ini file in XP, but it seems as though the instructions I got are only when the two OS' are on the same drive in different partitions.
Want to make linux default OS in a dual boot system on 2 seperate hard drives
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Dec 9, 2009
before i start messing with anything, i figured i better ask before i get myself into trouble. ive been searching around and havent seemed to have found anyone with a setup similar to what i am trying to do. here's what i'm doing:
i have two identical 20gb drives, hda and hdb. hda1 is root. i am setting up either rsync, dd, or cpio to copy hda1 to hdb1 possibly once a month with a cron job. I just want to have a monthly backup of root in case hda1 ever fails. no, i do not want to use fakeraid or mdadm to set up a raid1 array, just want a monthly backup. should hda fail, and i need to set hdb as first boot device in bios, and boot off of that, i need to have a working lilo on that drive as well. if i copy the boot sector with lilo off of hda onto hdb, the boot= parameter in lilo would still be pointing to hda, and not hdb.
so is there a way to set two multiple boot drives in lilo? if not, how would i go about installing a separate lilo on hdb with its own conf? i was thinking something along the lines of modifying lilo.conf on hdb1 to point boot=/dev/hdb and root=/dev/hdb1 and chroot to hdb and run lilo -v? and if i do the above, and i do boot off of hdb1, will everything work as it should? what about needing to modify fstab for / being on hdb1 now?
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Jan 12, 2010
I have two identical hard drives; same make, same manufacturer, same model, and same capacity, which I'm trying to run in a RAID1 mirroring scheme. The problem: configuration files for md arrays only lets me use device names, such as /dev/sdb and /dev/sdc. To keep these the same (and in the same order) when I boot I wanted to write a udev rule for them. Unfortunately, I have no way to differentiate between these two drives, as they seem to be identical. Normal methods of differentiating by size or model name wont work. I think I can use UUIDs; but I neither know how to get the UUID of a device/partition, nor do I know how to use it (if it is possible) in a udev rule.
Solution:
run
udevadm info --query=all --path=/sys/block/sdb # or whatever block dev
Look for and use "ID_SERIAL_SHORT" which is unique even for identically manufactured disks. Write a udev rule based on this property.
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Jun 3, 2011
I'm running Edubuntu 10.10 64 bit on an LTSP box here at work. Two of them, in fact. In each instance, we have a Ricoh MP2500 network printer.
Scenario 1 - I print, it works. Scenario 2 - I print, the printer heats up, the wheels spin, yet it never actually prints a page. Each box is from the same Edubuntu install CD. Each box is set up as identically as possible with very minimal differences (aside from software set, as one is for Middle School and the other for High School) Each scenario has an identical printer. Each scenario has the same printer driver.
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Oct 7, 2010
I have two identical laptops. One has an installed Ubuntu and parts that I want to use. The box itself is all beat up. The other box is newer but has a stale edition of linux. (Stale software means "seldom used.") I thought to be clever I would pull drive-A from box-A and install it into box-B. Likewise, I would install drive-B into box-A. This will leave my clunky software on my battered box and my newer software on the newer box.
Mechanically it works (doh!). However, neither box will see the network. When I look at the logs, I find a "rename wlan0 to wlan1" entry among others. If I put the drives back into their original box, all works correctly.
What could be going on that I cannot move the drives and have things just boot and run?
I thought that system start would detect the installed hardware, load the required drivers and all is right with the world. The "rename" log entry suggests that the old hardware details are somehow in the way of the new hardware discovery and configuration.
Is there some command I need to use or utility that I ought to run that says, "rediscover my hardware" or similar?
I already know how to use clonezilla and other ways to duplicate a drive contents to a second drive. (Note to reader: laptop drive to usb drive clonezilla takes quite some amount of time.)
Another reason that this is important lies in the ability to move a drive from in-use but failed hardware to stand-by working hardware in a fail soft recovery situation. I know that win-doze knows about the installed hardware and demands a re-install or "repair" to the alternate box... but this is linux not win-doze.
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Feb 12, 2010
What's the consensus on the least hassle-prone method to do a bare metal install on multiple machines? I've just been handed a network with 20 identical servers (they're ~4 year old HP quad-Opteron machines with identical hardware configs). They're currently running a mishmash of stuff and I've been told I can re-purpose them. I'd like to create a generic kickstart and pave over them all with CentOS 5.4 with the only difference being the IP address for each machine. I have physical access to the machines and already know the MAC address for each one. Sadly, they are racked up and have no floppy or optical drive, but they DO have an exposed USB port on the front panel.
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Mar 11, 2009
I have a dual boot with vista on disk 0 and ubuntu on disk1. I just installed a disk 2 that I would like to use to try out other distros. Ubuntu is the only linux experience I have had. I'm really not very good at all of this, so my questions before I start loading another distro are:
1. Does Fedora use GRUB as its installer?
2. When I installed ubuntu on disk 1 (sdb1), the install was very simple. I chose sdb1 for the install, it loaded it, and when it was done I simply had the choice of which drive to boot into. Will installing Fedora on disk 2 (sdc1) be just as simple, or will I encounter steps I must take to make it so that I have a choice of which disk/OS to boot into?
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Jun 11, 2010
How can I change the selected drives to boot from. I want to set my windows drive first so I don't have to select it each time.
I have ubuntu 10.04.
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Nov 17, 2010
A 10.10 LiveCD (burned from the ISO image) won't boot my system using my LG GSA-4167B DVD drive which has been working fine for several years.Upon boot, Ubuntu starts to boot up. The splash screen appears. The drive activity light flashes for a while and it sounds as if things are progressing. Then the drive gets into a funky pattern: click-click-spin fast. click-click-spin fast...
The purple splash screen is still present, with 5 red dots (not flashing) The LG drive happily boots up a Windows CD, BartPE CD, Ultimate Win CD, Macrium recovery CD, Gentoo distro CD, etc etc. Only the Ubuntu 10.10 LiveCD is problematic.Oddly, a 10.04 LTS LiveCD obtained with the book "Ubuntu for Non-Geeks" boots OK. (that CD is not burned at home). The LG GSA-4167B is 2005 vintage, with IDE interface. I swapped it for an even older (2004) LG DW1610 DVD drive. That drive boots the 10.10 LiveCD just fine.
I downloaded the 10.10 ISO image a second time and burned a second copy. Same results. The LG website had new firmware available for the GSA-4167B drive, so I downloaded that and flashed the drive. No change - it still won't boot the 10.10 CD. Are LG drives known to be problematic with Ubuntu? Are the CD-DVD drivers on the LiveCD limited in their functionality? If I go out and buy a new drive, should I avoid LG products? Perhaps I'l try burning the 10.10 ISO on to a DVD and see if that makes any difference.
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Jan 26, 2011
What would prompt this? i shut off teh computer and turned it back on , didnt press any buttons and it started checking my drives, so i pressed C and cancelled it.
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Jul 24, 2011
One hard drive (I'll call it hard drive 1 for the sake of this post) has windows xp and ubuntu on it. It dual boots fine and Grub is installed in the MBR. I physically removed that hard drive and installed a higher capacity hard drive (I'll call it hard drive 2). This hard drive (hard drive 2) is a dual boot (win xp and linux mint) and Grub is installed in the MBR. It works fine.
Here's what I want to do:
1. Make hard drive 1 the master drive, and hard drive 2 the slave drive. I know how to do this (hd pin settings, master drive on the end of the ide chain, etc).
2. Have a grub menu that allows me to boot any of the OS's from any of the hard drives. As such this grub menu should have 4 entries.
What I think I need to do is add two entries to hard drive one's Grub; 1 for window xp (on the slave drive) and one for linux mint (also on the slave drive). How do I do that? However, I wonder if there is a way to tell hard drive 1's grub to link to the grub on hard drive two - i.e. to make an entry show up that when selected would show hard drive 2's grub menu options. Is this possible?
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Jul 28, 2010
Somehow after recent system update I'm unable to find any drives in the system. I see all of them in Bios, Grub finds them as well, but while loading the kernel and booting system to console they are missing. fdisk -l shows nothing (but somehow it did show me 1 drive for 5 minutes and then it was lost as well) I suspect that it was caused by udev and hal update, but I did etc-update and recompiled the kernel to a newer version (but with the old config) and it didn't work. I'm able to boot in the system and somehow work in it, although on the boot stage I get errors like /dev/sda1 is missing.
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Jul 8, 2010
I am running the 2.6.25.14 kernel on a RedHat 5.3 X64 bit OS. I am booting off a USB compact flash. When I put two hard drives in a test system the OS does not allow me to access either, however if I have one hard drive inserted I am able to mount the hard drive fine. Extremely strange. When both hard drives are inserted dmesg reports a sde and sdf, it just will not let me access them. I am not sure if this is a hardware issue or OS.
fdisk /dev/sde says unable to open. smartctl -i /dev/sde says NO Medium found. When I boot with only one inserted i am able fdisk. mount, etc... /dev/sde just fine. The USB controller has 5 slots to insert various media, but I am just using it for its compact flash slot.Why will the system play nice with one hard drive and not with two?
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Mar 18, 2010
I have Windows XP installed. And I also plan to install CentOS 5.4.I have two hard drives. Hitachi 500 GB and WD 500 GB.Windows XP is intalled on first drive And I plan to install Linux on Second drive. And since i find some contradicting and not understood by me posts. I have to be sure what to do. I can install Linux, then i can edit grub. and add there something like:
title Windows
map (hd0) (hd1)
map (hd1) (hd0)
root (hd1,0)
chainloader +1
When its on one drive as I understand it will definately work. But if its on 2 different drives. There is a problem that windows doesn't boot from secondary drive. So I find this article witch i cannot understand. Do i have to understand it? Or its wrong and bad decision.
[URL]
I have no RAID.After all what is step by step process of creating bootable CentOS and Windows situated on different hard drives drives?
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