I have a Raid5 software partitioned using LVM (at centos 5.2 installation). Actually the raid is composed by 3 320Gb HDD. I would like to replace them with 3 2T hdd, but I'm worried about the alignment issues of the upgrade. I know it is easy to align the raid partition URL But what will happen to the LVM partition? Reformat and install everything is not an option
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I have 2 WD20EARS hard drives on the way (2 TB green WD disks with 4k sectors) and I'll be installing Centos 5.5 in RAID1 on them (2 partitions, one 16 GB / at the beginning and the rest in its own partition). I read the following thread: [URL]
and it seems that I might be having problems with the 4k sectors (Advanced Drive Format in WD lingo). I'm confused as to what exactly to do. I was thinking of downloading Fedora 14 Live CD and partitioning there and then switching to Centos 5.5 to install. Will that work? Seems I want the md 0.9 metadata because it doesn't have the space limit for me (2 TB) and it's stored at the end of the partition so it avoids alignment issues. Will I be able to make that happen with Fedora 14?
I am getting a new 4kb sector HDD for my laptop, WD scorpio black 750gb, I would like to image existing partitions on 512bytes sector HDD and move them to the new 4kb sector HDD, what's the best way to do this.
present config is as follows:
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
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I am planning to keep the same three partitions as the primary partitions on the new drive and add few more logical partitions. I would have liked to move to GPT but since I need Win 7, I am stuck with MBR partiotion table.
Now, I understand how to partition an Advanced format disk, what I want to know is how to move the existing partitions on the 80 Gb disk to the new disk?
I use Clonezilla to copy partitions but it is not compatible unless both the target and the source disks are already using 4096 sector size.
I can use Acronis True Image WD Edition to clone Win 7 but how do I clone Ubuntu?
Also my Laptop's chipset is limited to SATA 1.5, will it cause any issues, I know the bandwidth is not an issue.
So I finally bought an advanced format drive, the 2 TB Samsung f4. I will be using it on my slackware box, running slackware 12.2 with kernel 2.6.27-7. I intend to format the drive by hand with fdisk and start the first partition on sector 2048, or perhaps boot a livecd and format it with a newer version of fdisk or parted that will natively partition this drive correctly. My real question is, do I have to do anything special to add this drive to an existing LVM volume group? I'm thinking no, since LVM basically just breaks all your data into 4 MB chunks and spreads them across the pool of partitions you've defined, but I've found many conflicting opinions from searching google. To simplify things, I'm not using RAID of any sort, neither hardware nor mdraid.
View 2 Replies View RelatedI'm a bit at a loss on this one. I couldn't get a drive from a former RAID5 array to format. I did a dd to write zero's to the drive and attempted to fsck only to be stopped every time with the error: Couldn't find ext2 superblock, trying backup blocks.. fsck.ext3: Bad magic number in super-block while trying to open /dev/sda1
Smartctl shows no problems with the drive (a Seagate 750GB), but I haven't removed it and thrown it in a windows machine to do seagates proprietary drive diagnostics yet. Running Centos5.6 .I've never had this problem before. The drive is not mounted and the old md device has been removed as far as I can tell. It could still be attempting to assemble the RAID5 with the 1 drive, but I didn't see it attempt to do so.
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Can anyone tell me if F15 is aware of the new Advanced Format Hard disks. The new dell laptop has one of these drives in it. The reason for the question is the disk is a 250Gb but only seems to have 230ish available which does seem a lot to loose? The dell website only talks about Windows and not linux. Below is from their site:
"In an effort to support higher capacity hard drives, the Hard Disk Drive (HDD) industry is moving towards Advanced Format (AF) HDDs with 4KB sectors to address the current limitations with the 512-byte sector HDDs. The transition to 4KB sector HDDs will allow storage devices to more easily adopt larger capacities in both the notebook and desktop space. While hard drives will transition to 4KB sectors and to maintain backwards compatibility, current Advanced Format 4KB HDDs, also known as 512e HDDs, will emulate 512-byte SATA communications to hosts and will operate at 4KB."
My System Intel Core Duo E5300 Mobo - Gigabyte G31M-ES2L 1GB DDR2 800MHz RAM 4 x WD20EARS HDD I have been trying to install Fedora or Ubuntu for over a week. I thought it would take an hour and i would be away. I have been trying to install using the mdadm Software RAID feature. Everytime it takes about a day to format the drives and then i get an installation error. The drives state they are ready to use as is on any operating system other then WinXP, but this does not appear to be the case.
I am very new to Fedora... I have been doing some reading.[URL].. That information has been promising. I have been able to get into Fdisk off the live CD but i can't figure out how or if it is possible to do what i want it to.
Has anyone had any luck getting these drives to function correctly in a software RAID? I have had good luck with WD drives in the past and just assumed these drives would do what i wanted to but alas i have been proven wrong.
The partitions i wanted was...
- A 2GB swap parition
- A 10 GB RAID 1 partition for Fedora
- The remaining space as a Raid 5 for files.
Am i just banging my head against a wall here, or is this possible.
Upon trying to open a .wmv file, the system says it wants the above - which I suspect is not provided under the same name and is proprietary. Can anyone suggest the name of a plugin in the repository which would suffice? The file came as an attachment to an email file.
View 3 Replies View RelatedThis is the error message I'm getting when trying to Format the mdadm RAID5 created with 4 drives
Code:
Error creating partition: helper exited with exit code 1: In part_add_partition: device_file=/dev/md1, start=0, size=6001196531712, type=
Entering MS-DOS parser (offset=0, size=6001196531712)
MSDOS_MAGIC found
found partition type 0xee => protective MBR for GPT
Exiting MS-DOS parser
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I am about to purchase a new external hard drive which will be driven through the USB port. It will probably be a 1.0 TB drive from Frys/CompUSA/MicroCenter or some discount source. It will probably come formatted to run on a Windows machine and I intend this drive to be run only from my Linux laptop. I'd like to format it to be able to make the most of it from my Linux machine. Although re-formatting may not be absolutely necessary, as it probably will work "OK" just out of the box as is, how can I format it to get the maximum usage out of this new drive?
View 6 Replies View RelatedOld Commodore Vic 20/DOS/Wintel guy here who wants to make a first foray ever into Linux by building a home server with 10.04. I've found so much seemingly conflicting information that I'm lost at sea about hard drives.
I bought the Official Ubuntu Server Book, The (2nd Edition), and started reading it, learning about file system and planning a different /home partition, potential software raid, and such pre-install considerations.
The cheap hardware I had considered is: HP ProLiant ML110 G6 Intel X3440 2.53GHz 2GB Memory w/ DVD ROM & 250GB HDD 3 x SAMSUNG Spinpoint F4 HD204UI 2TB 5400 RPM 32MB Cache SATA 3.0Gb/s 3.5" 6 more GB RAM for total of 8 The Samsung drives are Advanced Format. I read some reviews about OS partition alignment issues, and the past 2 days I've been down numerous rabbit holes of search on this forum and google in general about whether this will be a problem in 10.04. I'm wallowing in my own search-overload-induced fear, uncertainty, doubt, and paranoia now.
The release notes lead me to believe that "no brainer" support for these drives is now baked in to 10.04 ? That if I just follow prompts, the new install will partition and format drives properly aligned?
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the recent versions of fdisk on Fedora 13 and Ubuntu 10.04 are supposed automatically to solve these things around 4k sector aligment thing if one starts fdisk with -u and -c flags. But I'm getting confused as the heads / sectors informations always differ every time I create a partition.I have WD Green 1.5TB disk. I want 2 partitions. sdb1 with 1.3TB and sdb2 with the remaining space. Here's how it looks like. When I create the first partition (1.3TB one), I get following listin with fdisk:
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# fdisk -lu /dev/sdb
Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
78 heads, 37 sectors/track, 1015342 cylinders, total 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
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This is sort of mixed between hardware and software but it seemed more appropriate to me here. I'm building a server for very fast disk access. We have 8x32GB SSD SATA drives and 4x300GB SSD SATA MFT drives. The 300GB SSD drives are the slow kind of flash that writes slowly, and strangely is limited to 10K writes per sector. Long term data integrity isn't a big deal because it is backed up continuously but fast access to data is desired. Additionally the filesystem that contains this data deletes about 2.5 - 4 gigs of data per day, and adds about 2.5-4 gigs of data per day.
My plan is to create a hybrid drive of sorts, where the smaller 32G drives, lined up in RAID0, create a fast "buffer" disk, and on some increment what is in the buffer is written in bulk to the slower writing 300GB SSDs. I had two thoughts on how to achieve this, but ultimately I think that LVM snapshots are the best way to achieve this, put the read only "snapshot" on the big SSD drive and the other "differencing" part of the snapshot on the faster raid0. I'd much prefer a simpler solution where there is one block device to mount and all this is handled in the background.
I need some assistance in trying to format a USB hard drive to vfat format but can't seem to do so. I am currently using RHEL 5.3. I have tried the following commands and they all come back as "command not found"
mke2fs vfat /dev/sc1
fdisk vfat /dev/sdc1
mkfs.vfat /dev/sdc1
What am I doing incorrectly?? Can someone please point me in the right direction??
Basically I got Windows 7 installed on my laptop and it's been doing nothing but slowing down more and more even though it isn't used for much more than basic internet use and I realized the hard drive was the cause, I did a bunch of stuff to try to fix it that I won't get into here, and in basic I'm to the point I'm just going to reinstall Windows 7, but this time with the help of Ubuntu's partitioning utilities.
I've already had the first ~5GB of the drive overwritten with zero's (thanks to DBAN) and now I'm booted on the Ubuntu LiveCD and trying to learn the command line stuff for formatting a drive. What I want to achieve is use the smallest amount of space possible for the MBR and that's also a point I don't quite understand.
After some research on Google I read that the MBR is on one sector only the very first one, yet the first partition on a hard drive starts anywhere from 63 to 4096. Why are they so far apart? And can I force the partition to be moved closer? I know I know their is pretty much no purpose to this but it bugs me knowing that their might be 31MB (64 512byte sectors minus 1 (MBR) and 64 (beginning of partition)) just going to waste when I could put the NTFS MFT there. Then the second and last part I want to understand is I want to make the NTFS partition have a 512byte allocation unit size and have it lined with the 512sectors on the hard drive so it can have the max performance. Does anyone know how to do this stuff or could find better info than I have on the internet?
I had a sata drive go down on my software raid array a couple days ago..After replacing the defective drive, I rebuilt it using fdisk to set partitions and mdadm to add the drive back into the raid array.After getting md2 to mount to /mnt I copied the /mnt/etc/fstab and /mnt/etc/mdadm.conf to the /etc directory and rebooted..When I boot, my /dev/md2 partition is not mounting to / It is not loading all of the services at boot time it should.. the size of /dev/md2 on / is even wrong.. it should be about 1.3TBwhen I manually mount /dev/md2 to /mnt I can access all of my data, through /mnt/var/www/vhosts and so on.. I am at a loss, why is the machine booting to this craziness?All of my data, that I know of can be accessed when md2 is mounted to /mnt[root@ESS000272 etc]# cat mdadm.conf
# mdadm.conf written out by anaconda
DEVICE partitions
MAILADDR root
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What is the most advanced GUI torrent client that work perfect in CentOS 5.3 GNOME Desktop?
View 5 Replies View RelatedI'm a bit sick to my stomach right now. I had a raid5 array (5x1.5TB drives) and I upgraded to lucid and now the array no longer works. Initially, on boot, it would try to mount it from fstab and that failed consistently as it wasn't assembling it.
then I tried to assemble it by hand (--scan) and that seemed to cause it to mount degraded (it seems md in the process tried to use on of the disks for something else!), but when I look at its partition table, it's empty. pretty pissed at the moment (somewhat at myself, didn't really need to upgrade), any ideas what went wrong?
I'm trying to disable TCP Segmentation offloading across the board in our datacenter to improve performance. Reading the history in the CentOS Bugzilla and the upstream's Bugzilla, they recommend doing this within the udev rules. See:[URL].. So, I created a new udev rules file that looks like this, as filename /etc/udev/rules.d/50-eth_tso.rules:
ACTION=="add", SUBSYSTEM=="net", NAME=="eth0", RUN+="/sbin/ethtool -K eth0 tso off"
ACTION=="add", SUBSYSTEM=="net", NAME=="eth1", RUN+="/sbin/ethtool -K eth1 tso off"
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Can anyone out there figure out just what I'm doing wrong - I've been struggling with this for about 2 hours trying to make it work, and simply can not figure it out - and would like to not resort to hacking the problem and adding the ethtool commands to /etc/rc.d/rc.local!
My box has a raid5 array (mdadm) with everything in it (/boot and /) but swap that is actually spread across the 4 drives. I had ubuntu 10.10 installed (amd64) with grub1, when I upgraded to natty (11.04) it automatically installed grub2. Well boot fails, it always goes to grub rescue no matter what happens. I've installed and reinstalled grub2, and boot always fails with:
"error: file not found".
In grub rescue I can see that md0 is actually available, an "ls" to (md0)/boot succeeds but the strange thing is that an "ls" to (md0)/boot/grub prints nonsense, as does an "ls" to (md0)/boot/usr/lib/grub/i386-pc/. When I try to load the required modules for boot (linux raid etc) in grub I also always get a "file not found error" (I fsck'd md0, which says everything's fine). I have installed the latest version of grub2 and executed grub-install in all four drives.
As the title says, I have a failed RAID5 hard drive. What's the easiest way I can go by replacing it? I've seen many ways to do this, but I would like to know what other people are saying about this, and see how you would do it.
P.S. This is the one I found. [URL]
I'm trying to create a user account for my children in Ubuntu 10.04
When creating their account, I have turned off the 'Connect to ethernet and wireless' option of the Advanced Settings.
However, when I log into their accounts, they still have full access to the internet through both the wireless and ethernet connections. Is this option for some other purpose?
Is there an alternate way to limit internet access for childrens' accounts in Ubuntu? (I'm used to MS Family Safety as a filter for internet access - is there an eqivalent for Ubuntu?)
I had a problem with my laptop which is dell studio 1569 wireless card is as shown above intel centrino advanced n-6200. I had ubuntu before and it worked very well but with centos and oracle enterprise linux (not unbreakable) it does not work at all? And also the graphics card not fully configured I knew that when I tried an opengl apps?
View 3 Replies View RelatedI recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, I noticed one of the hard drives had been removed from the raid array. I tried to add it back with mdadm --add, but it just put it in as a spare. I figured I'd get back to it later.Then, when performing a reboot, the system could not mount the raid array at all. I removed it from the fstab so I could boot the system, and now I'm trying to get the raid array back up.
I ran the following:mdadm --create /dev/md0 --assume-clean --level=5 --chunk=64 --raid-devices=3 missing /dev/sdc1 /dev/sdd1I know my chunk size is 64k, and "missing" is for the drive that got kicked out of the array (/dev/sdb1).That seemed to work, and mdadm reports that the array is running "clean, degraded" with the missing drive.However, I can't mount the raid array. When I try:mount -t ext3 /dev/md0 /mnt/fooI get:
mount: wrong fs type, bad option, bad superblock on /dev/md0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
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I have a little nice Ubuntu server with 6x 1TB drives assebmbled into a RAID5 array. Recently SATA cable of one of the drives failed. So I ordered a new cable and ran the server in degraded mode for a few days. Like this:
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/dev/md0:
Version : 00.90
Creation Time : Sat Sep 19 10:39:11 2009
Raid Level : raid5
Array Size : 4883812480 (4657.57 GiB 5001.02 GB)
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I'd like the 6th drive to be active, not spare, like before. Should I just wait for rebuild to be finished (it can easily take over 1 day)? Or should I add it somehow differently to be active immediately?
I'm not sure, but I think as I simulated failures unplugging one of the disk, after plugging it in again, the "failed" drive was active again and rebuilding was started as well of course. But it was 2 years ago, so...
The array works just fine for now - I can access files, etc. But I suspect, that in this state if another cable or drive fails, it won't survive anymore. Even after rebuilding is finished, but the 6th drive stays is still marked as "spare". Right?
My original config:
**Partition/Drive info**
/dev/sda Boot----------> 298.09 GB Hitachi HDT72503
20GB /
16GB /swap
50GB /var
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1. For some odd reason I tried connecting to a samba share as I had it setup and I could not.
2. Looked at webmin and it said my whole /dev/md0 RAID5 was being used..about 7.8TBs. decided to check my RAID5 setup and drives and noticed
**NEW Partition/Drive info**
/dev/sda Raid Array 1 1.82 TB SAMSUNG HD204UI
/dev/sdb Raid Array 1 1.82 TB SAMSUNG HD204UI
/dev/sdc1 /
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I didn't connect any new drives or anything. I had checked my "mdadm.conf" and "fstab" and everything looked the same?
I am setting up a new server and am in the midst of testing RAID. This is an Ubuntu 9.10 server. RAID1 (/dev/md1) is spread across 12 one-terabyte SCSI disks (/dev/sdi through /dev/sdt). It has four spares configured, each of which are also one-terabyte SCSI drives (/dev/sdu through /dev/sdx). I have been following the instructions on the Linux RAID Wiki ([URL]....
I have already tested the RAID successfully by using mdadm to set a drive faulty. Automatic failover to spare and reconstruction worked like a champ. I am now testing "Force fail by hardware". Specifically, I am following the advice, "Take the system down, unplug the disk, and boot it up again." Well, I did that, and the RAID fails to start. It outright refuses to start. It doesn't seem to notice that a drive is missing. Notably, all the drive letters shift up to fill in the space left by removing a drive. The test I did was to:
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Is removing a disk from the bus a reasonable test in the first place? Meaning, is this likely to happen in a production environment by other means than a human coming by and yanking out the drive? Meaning, is there a hardware failure that would replicate this event? Because, if so, then I don't know how to recover from it.
I have looked thru the forums and I am not sure if LSI 8204ELP definitely works with Centos 5.3 or 5.2 or 5.1 or not. Can anyone who has had a positive experience with this hardware combination give some feedback etc. mobo is supermicro c2sbx [URL]
View 2 Replies View RelatedOk, as the title indicates I have a RAID5 array with 4 500GB SATA drives. This is the only drive configuration on the system (i.e. the OS also resides in the RAID array). I'm running CentOS 5 and need to know how to go about increacing the space in the RAID array by replacing the drives with 4 1TB drives.
View 3 Replies View RelatedI 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?.
