Hardware :: Replaced 2 IDE Drives: CentOS Only Sees 1
Jan 6, 2010
I recently had to reload CentOS (5.3) on a box because of an unrelated problem (one of its SATA drives went belly up). I decided to update the old (reliability questionable) 80 GB IDE HDs that had been in it with some new 160's while I was changing stuff around.
the BIOS sees both IDE drives, and so does a bootable Acronis CD I have (boots some Windows version). But CentOS refuses to see both the IDE drives (the new SATA drive dropped in w/o difficulty). I spent some time messing with Master/Slave settings and switching disks around--CentOS only sees the Master disk (whichever physical drive that happened to be at the time--clearly was not a bad drive). Here's what dmesg has to say for itself in the relevant section:
Code:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
NFORCE-MCP55: IDE controller at PCI slot 0000:00:04.0
NFORCE-MCP55: chipset revision 161
NFORCE-MCP55: not 100% native mode: will probe irqs later
NFORCE-MCP55: BIOS didn't set cable bits correctly. Enabling workaround.
NFORCE-MCP55: 0000:00:04.0 (rev a1) UDMA133 controller
[Code]....
The MB is a Tyan S2912 w/ 2 Dual-core Opterons (with an admittedly older BIOS, but the BIOS sees the drives; and so does the different OS so it seems like it's gotta be something w/ CentOS). The extra space of the 2nd IDE drive was not critical, so I just took it out for the time being (may try a BIOS update later).
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Jun 4, 2011
Fedora is having trouble identifying a raid partition, it sees them as separate drives. I got drivers from dell, but during a Fedora dvd install, it mentions nothing about a place to install extra drivers.
When it says it must "initialize" the drives, Fedora then breaks the dell bios raid. How to either install the dell drivers or make Fedora see the raid partition as one?
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Feb 25, 2010
I just replaced a DVD-RAM drive in one HP server running CentOS5 (2.6.18-164.11.1.el5PAE #1 SMP )
The drive is recognized by the OS:
# lshw -class disk
*-cdrom UNCLAIMED
description: SCSI CD-ROM
product: DVDRAM GSA-T50L
[Code].....
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Sep 8, 2009
After reading and trying tons of tutorials and several OS reinstalls, I'm stuck trying to load wireless on my Dell Vostro 1400 laptop. Before you say search forums! I hurry to tell I did. No solution seems to work. WLAN chipset - Broadcom's BCM4311 / BCM 2050. 1st scenario - native CentOS 5.3 drivers Although CentOS recognize WLAN card and displays it's name correctly, neither network or NetworkManager sees any of wireless networks.
2nd scenario - Broadcom's drivers Most know Broadcom has released Linux drivers. I had some more luck with them than in 1st scenario although problems occur. After successfully compiling Kernel module, wireless networks are discovered and can be successfully connected but no pages load. It seems like DNS is not resolving at all and page loading timeouts instantly. Tested on TKIP-encrypted network.
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Mar 29, 2010
I noticed that my VPS was rebooted recently and a new service appears
[root@localhost ~]# pstree
init─┬─brcm_iscsiuio───2*[{brcm_iscsiuio}]
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Oct 3, 2009
i find this is an issue which might be tiresome for everyone except for those experts. Esp. for the computers which are dual booting(both windows xp and centos installed in the same computer), that when we are in CentOS we need to switch onto windows immediately. and vice versa. i see this is possible only by shutting down the centos/windows and then restarting onto the other OS.
Can anyone tell me the the solution to work simultaneously both xp and centos without the need of shutting down and restarting There maybe or may not be the solution...but i find the pleasure to know if there is for example, remote desktop connection in windows xp, is there any solution, we can work on windows via centos or vice versa ( in the same machine),
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Apr 7, 2010
Since RHEL is similar to CentOS posting it here.
Upon booting from DVD, i get the below error: "CentOS CD Not found in any of the media drives. Please insert CentOS CD and press OK."
I have IDE Sony DVD RW AW-G170.
BIOS Setting:
Downloaded the CentOS-5.4-i386-bin-DVD image from centos.org from DVD.torrent using bittorrent file.
When booting from the DVD, it gives me the boot prompt:
Upon pressing enter, the log messages of the boot detect the media drive as: hdc: Sony DVD RW AW-G170 IDE ATAPI CD.
The below steps occur:
1) Select the keyboard type: selected us
2) Select the Language : selected us
3) Select the image:
- Local CDROM
- Hard Drive
- NFS Image
...
...
selected Local CDROM
Then the above error "CentOS CD Not found in any of the media drives. Please insert CentOS CD and press OK."
The booting steps does not ask the for media check step.
The below methods have been tried to solve the problem:
- Burnt the image in another 2 DVDs but the same error "CentOS CD Not found in any of the media drives. Please insert CentOS CD and press OK."
- Upon burning the DVD image , selected the DVD read speed: 8x. Upon burning the DVD selected 18x for burning. and then tried to boot with that DVD
- At the boot prompt entered : linux hdc=cdrom replaced hdc=hdb but the error remains.
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Jul 9, 2010
I have run into a bit of a problem. Trying to get a new install of Centos onto a pair of 750GB drives.
These were once part of a software raid setup. The installer reconises them as a ddf1 raid set. so it does not list the drives as 2 individual drives. I can get around this with the nodmraid
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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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May 30, 2011
I've got a some new servers populated with Hitachi 3tb disks. The disks use the GPT partition table with normal size sectors. I was able to complete an install by using Ubuntu Natty to format the drive and install Grub2, then run a patched version of the CentOS installer following these instructions here: [url]
It works, but I've installed Ubuntu on another partition just in case I need to make any changes to the disk. I'm wondering if I can upgrade to Grub2 and install GPT aware partitioning tools so that I don't have to reboot into Ubuntu to make those changes.
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Apr 25, 2009
I have a problem with a VM running Centos 5.3 on a Centos 5.2 hypervisor. Any kernel install makes the system unbootable and I have to copy an old /boot directory to get it to boot again. After some investigation I found that grub was always failing. These are the partitions I have. xvda is the OS virtual drive. xvda1 is the /boot partitition and xvda2 is the LVM partition. A standard default install.
cat /proc/partitions
major minor #blocks name
202 0 14648448 xvda
202 1 104391 xvda1
202 2 14538825 xvda2
202 16 195313152 xvdb
202 17 195310206 xvdb1
253 0 11337728 dm-0
253 1 2031616 dm-1
253 2 190840832 dm-2
Apparently, this file could be suspect. But it seems to be OK according to what I have read.
cat /boot/grub/device.map
# this device map was generated by anaconda
(hd0) /dev/xvda
If I try to re-install grub I get...
Attempt 1)
grub-install hd0
/dev/xvda1 does not have any corresponding BIOS drive.
Attempt 2)
grub-install /dev/xvda
expr: non-numeric argument
/dev/xvda1 does not have any corresponding BIOS drive.
Attempt 3)
grub-install --recheck hd0
Probing devices to guess BIOS drives. This may take a long time.
No suitable drive was found in the generated device map.
Reverting to backed up copy.
Attempt 4)
grub-install --recheck /dev/xvda
Probing devices to guess BIOS drives. This may take a long time.
No suitable drive was found in the generated device map.
Reverting to backed up copy.
Attempt 5)
grub
Probing devices to guess BIOS drives. This may take a long time.
GNU GRUB version 0.97 (640K lower / 3072K upper memory)
[Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename.]
grub> root (hd0,0)
root (hd0,0)
Error 21: Selected disk does not exist
This is my grub.conf file...
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that all kernel and initrd paths are relative to /boot/, e.g.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/xvda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-128.1.6.el5xen)
root (hd0,0)
kernel /vmlinuz-2.6.18-128.1.6.el5xen ro root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.18-128.1.6.el5xen.img
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Jun 22, 2011
I have recently lost quite a bit of electronics around the house to a power surge/lightning strike (all items were on APC backups). The drives from my server were undamaged and I have a new server to host them in. I am having a hard time getting the new server to boot up with the old drives (trying to avoid a fresh install/rebuild of server). The hardware is very similar but not identical. At this point it gets to the following during the boot process:
Scanning and configuring dmraid support devices
md: Autodetecting RAID arrays
MD: autorun ...
MD: ... autorun DONE.
MD: Autodetecting RAID arrays.
[Code]...
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Oct 11, 2009
I am Setting up 3 HP Proliant servers with 2 250GB Hard Drives in each. How Do I mirror the drives, and link all the servers together??? I am installing Centos 5.3. From the software install menu I installed Gnome, and the Server software, but can't seem to figure out how to get into the server side of it from gnome. Sorry for all the questions, but I have been out of the loop of all this for about 8 years and trying to re-learn everything.
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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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Mar 30, 2011
I tore down my old ftp server running FreeNAS because it had some issues. I decided to add a couple more drives and install CentOS on it instead. So now I have 4x 2TB drives that I set up yesterday.OS is installed on a usb flash drive exclusively while I chose to set up the 2TB drives in two stripes and then mirrored, for RAID0+1 instead of RAID1+0.
/dev/md0 = drive 1+2 in RAID0
/dev/md1 = drive 3+4 in RAID0
/dev/md2 = md0+md1 in RAID1
Well, the sync time for these two mirrors of blank drives is almost done, having taken some 15+ hours.I chose this setup to have a single 3.6TB file system mirrored to another 3.6TB for "backup". As this is only going to be a headless ftp server, I don't need massive redundancy/backup. A mirror should suffice if I need to pull some files.So now I'm second guessing myself. I'm wondering if it is even worth it to stripe 2 drives into a single volume with such large sync times. Since data xfer will be over internet, I don't require the massive file writing capacity that would be preferable if it were in my home as a NAS. So, the "performance" increase of RAID0 is not strictly mandatory.
I'm wondering if I should just wipe the drives and set them up in JBOD or LVM instead of RAID0 arrays.In case of boot drive failure, I'd be booting a livecd to xfer files elsewhere or recover the boot drive. So, what difference would I see if I were livebooting to md0, md1, md2 for data viewing as opposed to livebooting to an LVM or JBOD array?As an aside, the drives are WD20EARS, which are 4k sectors which I aligned to start at sector 2048 in fdisk.
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Apr 4, 2009
I want to change one of our poweredge 6450 servers over to Linux, specifically CentOS, however, I cannot seem to install the operating system. When I boot to setup, go through the first couple of pages and then go to the page that asks you where to install CentOS, no drives are shown in the list, and I can't continue. I'm guessing there are missing drivers for the SCSI controller or something along that lines, but I'm not sure, and I can't find any answers on Google either.
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Dec 11, 2010
How can I mount 2 NTFS hard drives, preferebaly automaticaly on startup. a GUI would be nice too.
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Feb 17, 2011
I have a CentOS 5 based Linux system with a 3Ware 9550SU RAID card and four 500GB drives set up in a RAID5 array (3 in the array and 1 hot spare).
I want to 'replace' these drives with four 2TB drives without data loss. My server case has a total of 8 drive bays all hot-swap and all attached to the RAID card, this means I have four empty drive bays on the RAID card.
One thought is to put the four new 2TB drives in the empty drive bays, configure them in a new RAID5 array. Then the question is now to I "mirror" the original RAID5 array over to the new one?
This is just a thought though, I am not sure it will work. In short my question to this forum is how do I accomplish this upgrade?.
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Jan 15, 2010
centos 4.4 - 3 of 4 hard drives removed now won't boot- can't find lv so kernel panic
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Jan 23, 2009
I have tried issuing this command:
[root@C5 ~]# hdparm -a 256 -d 1 -r 0 -k 0 -u 0 -c 1 -A 1 -K 0 -P 0 -X 66 -W 0 -S 0 /dev/sda
/dev/sda:
setting fs readahead to 256
setting 32-bit IO_support flag to 1
[code]....
Note that setting most of the parameters fails - and it still appears to be in 16 bit PIO mode. Am I using the wrong tool here - or incorrect parameters - or are the results misleading? Is there some other interpretation?
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Feb 23, 2009
I'm in rescue mode with Centos 5.2 disk trying to install/mount a new disk to extract data out from the failed server.
Plugged in a new SATA drive and syslog shows the drive being detected
SCSI device sdg: blah
sdg: Mode Sense: 00 3a 00 00
sdg: unknown partition table
sd 3:0:0:0: attached scsi disk sdg
However fdisk and mount does not find the drive. I tried echo "---" /sys/class/scsi_host/host3/scan based on one of the previous threads but get "write error: invalid argument".
how should I get the drive to be usable?
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Apr 6, 2009
I am attempting to upgrade a system from 4.7 to 5.2 using a (now) DVD drive attached to the onboard IDE. Originally I had tried using a remote NFS image and a USB stick but I thought maybe there was a problem with the image. I can get up to the point of the installation of selecting the keyboard for the system and then it freezes and never goes any further. It doesn't appear to be a kernel panic since I can still switch between consoles.
I've got an MSI K9NGM2-FID with 14 drives in it. It serves as a file server for our backup server. It's got a secondary 4 port Silicon Image SII 3114 SATA card using the sata_sil module, and an old IDE Promise FastTrak TX2000. Technically I could have 16 drives but the 750W PS is walking the fine line on tripping it's self-breaker with the 14 drives and 7 fans. I would like to NOT have to disconnect all of this to do the upgrade.
I thought maybe that running the install using the "noprobe" option would help so it didn't detect and load the modules for the Silicon Image or the Promise cards and detect all of the drives but it still gets stuck on the step after selecting the keyboard. The installation info console and the dmesg console don't really provide any useful information. The installation console says:
INFO : moving (1) to step welcome
INFO : moving (1) to step language
INFO : moving (1) to step keyboard
INFO : moving (1) to step findrootparts
And the last lines of the dmesg console says:
<6>device-mapper: multipath: version 1.0.5 loaded
<6>device-mapper: multipath round-robin: version 1.0.0 loaded
<6>device-mapper: multipath emc: version 0.0.3 loaded
Is there a hidden "debug" option that will turn on a lot of extra logging?
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Jun 10, 2010
would anyone here happen have gotten one of these successfully up, running &, aligned on 5.5? i only want two partitions. one 2gig for swap and the rest mounted @ /. i've googled myself into complete and utter confusion.[Moderator edit: changed the title to something more informative
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Jul 23, 2010
I am hosting a few customer servers now, all of which are virtual machines running on a CENTOS 5.x host. Each Centos host has a couple of extra drives. When I formatted them ext3 they automatically had a schedule of a full forced fsck after 6 months. Do I really need to do that check regularly? It results in a fairly large outage since my disks are each 1TB and there are up to three extra drives on each server. I try to reboot these servers every 6 months but this part adds a large amount of time to a routine reboot.
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Oct 20, 2010
Our CentOS 5.5 server has an intermittent problem where kswapd0 begins using 100% CPU, driving the system load to 20-30 and higher, and eventually crashes the server. The problem seems to be triggered by an intensive Java process (Lucene indexing), but only once every month or two. Lucene reindexing normally runs every 15 minutes without a problem. When the problem happens, there is still plenty of free RAM (as measured by /usr/bin/free's "buffers/cache" value, which is 1.5GB) and free swap space. The server is running MediaWiki 1.15 with the standard CentOS Apache, PHP, MySQL. My intuition is that this is a kernel/swapper bug.
Kernel info:
$ uname -a
Linux myhost 2.6.18-194.11.1.el5 #1 SMP Tue Aug 10 19:05:06 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Memory info:
Normal memory usage:
$ free
total used free shared buffers cached
Mem: 3090688 2769932 320756 0 258416 1531780
-/+ buffers/cache: 979736 2110952
Swap: 2097144 8212 2088932
Memory usage 30 seconds before a crash:
$ free
total used free shared buffers cached
Mem: 3090688 3050764 39924 0 113772 1309972
-/+ buffers/cache: 1627020 1463668
Swap: 2097144 179480 1917664
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Jan 22, 2011
i want to give some permission to non root users so that they can mount drives without need of root password.
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Apr 27, 2011
Why does ubuntu only see a single core on my quad-core cpu? All cores are enabled in the bios.
Here are some details about my hardware...
$ dmesg | grep Phenom
[ 0.812775] powernow-k8: Found 1 AMD Phenom(tm) II X4 810 Processor processors (1 cpu cores) (version 2.20.00)
$ uname -a
Linux xyz 2.6.32-31-generic-pae #61-Ubuntu SMP Fri Apr 8 20:00:13 UTC 2011 i686 GNU/Linux
[Code].....
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Mar 29, 2010
I got a 450 GB hard drive from which fedora boots from.However when i look at grub,grub> geometry(hd0,0) and do the cylinder/head/sector math, it only comes to 4GB instead of 450gig. why it sees only 4G?
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May 23, 2010
I've looked high and low but I haven't been able to find any example of what I'm currently experiencing with my hard disks.First off, I'm running CentOS as a Samba file server, on a Soltek SL-K8TPro-939 and AMD 64 3200+ (all the rage of five years ago). Here's my disk setup
Drive #1 (80 GB)
-Boot partition
-LVM partition (this drive holds the root filesystem[code]....
Ok, so I get a notification in my system mail yesterday: The following warning/error was logged by the smartd daemon:
Device: /dev/sda, unable to open device
For details see host's SYSLOG (default: /var/log/messages).You can also use the smartctl utility for further investigation.No additional email messages about this problem will be sent.
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Sep 23, 2011
I have a home samba server with a 3ware Escalade 8506-8. I have 5 x 500 gig hard drives in a RAID 5 array. Recently, my 8506 died and I need to get a new one. However, I saw a 3ware Escalade 9500S-12 on ebay for about $20.00 dollars more than a replacement 8506-8.
My question is, if I put my drives on the 9500S, will it recognize my existing RAID array? Or will it want to build a new RAID array and format all of my data?Hope I have asked this question clearly, little short on sleep this week.
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