search for: mdstat

hi all, In the past I used software RAID-1 and monitored /proc/mdstat to make sure things were ok in the array. I am starting to play with /dev/mapper and was wondering how I monitor this for a disk going bad. Thanks, Jerry

When a new system CentOS-4.4 is built the swap partition is always reversed... Note md3 below, the raidtab is OK, I have tried various raid commands to correct. swapoff -a raidstop /dev/md3 mkraid /dev/md3 --really-force swapon -a And then I get a proper ourput for /proc/mdstat, but when I reboot /proc/mdstat again reads as below, with md3 [0] [1] reversed. [root]# cat /proc/mdstat Personalities : [raid1] md3 : active raid1 hda3[0] hdc3[1] 1000320 blocks [2/2] [UU] md1 : active raid1 hdc1[1] hda1[0] 1953408 blocks [2/2] [UU] md2 : active raid1 hdc2[1] hda2[...

Hi I have a Raid 1 centos 4.4 setup and now have this /proc/mdstat output: [root at server admin]# cat /proc/mdstat Personalities : [raid1] md2 : active raid1 hdc2[1] hda2[0] 1052160 blocks [2/2] [UU] md1 : active raid1 hda3[0] 77023552 blocks [2/1] [U_] md0 : active raid1 hdc1[1] hda1[0] 104320 blocks [2/2] [UU] What happens with md1 ? My...

dmesg is not reporting any issues. The /proc/mdstat looks fine. md0 : active raid1 sdb1[1] sda1[0] X blocks [2/2] [UU] however /var/log/messages says: smartd[3392] Device /dev/sda 20 offline uncorrectable sectors The machine is running fine.. raid array looks good - what is up with smartd? THanks, Jerry

Hi, I hope someone can help. Just started to play with software RAID on Centos 3.5 and was trying to simulate a faulty drive by using the -f switch on mdadm to mark the partition (drive) as faulty and I then I removed and readded the drive, which quit happily rebuilt according the /proc/mdstat and the output from the --detail switch of mdadm. After all this mucking around I shutdown the system and tried to restart it in the morning but the system now won't boot, it gets as far as "GRUB loading" and just stops I have hard reset to get it to reboot. I have rebooted usin...

...raid10 on a centos 4.8-ish system here, and shortly thereafter remembreed I hadn't updated it in a while, so i ran yum update... while installing/updating stuff, got these errors: Installing: kernel ####################### [14/69] raid level raid10 (in /proc/mdstat) not recognized ... Installing: kernel-smp ####################### [19/69] raid level raid10 (in /proc/mdstat) not recognized is this a problem? the raid10 'seems' to work....

From looking at mdstat it appears I have a RAID partition missing. There are NO errors in /var/log/messages about disk errors or anything. What happened to my sda1??? I had a power outage last week. Any ideas??? Jerry more /proc/mdstat Personalities : [raid1] md1 : active raid1 sdb3[1] sda3[0] 236717696 blocks [...

How can I tell wich HDD to swap, when the "cat /proc/mdstat" says one HDD of the RAID1 array has died? Does the HDD's has some serial numbers, that I can see in "reality", and I can get that number from e.g.: a commands output? How could I know wich HDD to swap in e.g.: a RAID1 array? thank you -------------- next part...

...version", FUInt32; + "logsectsize", FUInt32; + "logsunit", FUInt32; + "lazycount", FUInt32; + "rtname", FString; + "rtextsize", FUInt32; + "rtblocks", FUInt64; + "rtextents", FUInt64; + ]; + (* /proc/mdstat information. See linux.git/drivers/md/md.c *) "mdstat", [ "mdstat_device", FString; @@ -243,6 +272,7 @@ let camel_structs = [ "partition", "Partition"; "application", "Application"; "isoinfo", "ISOInfo&quot...

...boot >> the system. > The Intel RST RAID (aka Intel Matrix RAID) is also known as a > fakeraid. It isn't a hardware RAID, but instead a software RAID that > has a fancy BIOS interface. I believe that the mdadm tool can examine > the RAID settings, and you can look at /proc/mdstat to see its status, > although from what I remember from previous posts, it's better to just > let the BIOS think it's a JBOD and use the linux software RAID tools > directly. > I see, thank you. Right now I am running off one of the disks because of the mishap, I am also waitin...

Hi, xfs is supposed to detect the layout of a md-RAID devices when creating the file system, but it doesn?t seem to do that: # cat /proc/mdstat Personalities : [raid1] md10 : active raid1 sde[1] sdd[0] 499976512 blocks super 1.2 [2/2] [UU] bitmap: 0/4 pages [0KB], 65536KB chunk # mkfs.xfs /dev/md10p2 meta-data=/dev/md10p2 isize=512 agcount=4, agsize=30199892 blks = sectsz=512...

...on a server destined to have a dozen SATA drives in it. The server is fine, raid 5 is set up on groups of 4 SATA drives. Today we decide to disconnect one SATA drive to simulate a failure. The box trucked on fine... a little too fine. We waited some minutes but no problem was visible in /proc/mdstat or in /var/log/messages or on the console. I ran mdadm --monitor /dev/md0 and no problem was shown. We rebooted still without the drive and finally mdadm --monitor reported that the array was running in a degraded state. We reconnected the SATA drive and still nothing was reported and nothing...

...detect /dev/sda3 27652 30201 20482875 fd Linux raid autodetect /dev/sda4 30202 30401 1606500 5 Extended /dev/sda5 30202 30392 1534176 82 Linux swap kk...the ide drives; hda and hdc...3 partitions 3 arrays md0 1 and 2 cat /proc/mdstat shows it's acting as it should. when I boot the system up, it sees the drive connect thru usb and calls it sda (for what reason I don't know. I partitioned it to the same specs as the 2 ide drives as per the bottom of fdisk -l. Now, trying to go by: http://www.redhat.com/docs/manuals/ent...

Is there a reason why after a software raid install (from kickstart) that md1 is always unclean. md0 seems fine. boot screen says md1 is dirty and cat /proc/mdstat show md1 as being rebuilt. Any ideas? Jerry --------------- my kickstart -------------- echo "bootloader --location=mbr --driveorder=$HD1SHORT --append=\"rhgb quiet\" " > /tmp/partition-information echo "clearpart --all --initlabel...

Hi all, This morning I received this notification from mdadm: This is an automatically generated mail message from mdadm running on server-mail.mydomain.kom A Fail event had been detected on md device /dev/md1. Faithfully yours, etc. In /proc/mdstat I see this: Personalities : [raid1] md1 : active raid1 sdb2[2](F) sda2[0] 77842880 blocks [2/1] [U_] md0 : active raid1 sdb1[1] sda1[0] 305088 blocks [2/2] [UU] unused devices: <none> Pls help me. What should I do? Thank you very much, -- Fajar Priyanto | Reg'd Linux User...

hello all, I have a setup that is raid 1 and put the mirrored drive back in and now it is still showing as degraded saying: raid1: raid set md6 active with 1 out of 2 mirrors with this message on all the raids.i know i am wrong by saying this but i thought putting in the driving and rebooting would start the re syncing itself. what do i have to do to add this back in, i am so confused with this

Dear all, I'm not used to handling software raid. I've inherited a server which has raid 10 set. one of our disks failed, and it's to be replaced today. My question is; any hint how to add this new disk to the existing raid array ? first thought is :- Create identical partitions as other disks in the array i'd like to add it to.- add it to raid. Though i'm extremely worried of

...v/sdb Disk /dev/sdb: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdb1 * 1 522 4192933+ fd Linux raid autodetect # cat /proc/mdstat Personalities : [raid1] md2 : active raid1 sdb1[1] sda3[0] 4192832 blocks [2/2] [UU] md1 : active raid1 sda2[1] sda1[0] 119997376 blocks [2/2] [UU] What I want to do: - have on each disk 2 partitions (4gb for swap and the 200gb+ the rest for /) - raid 1 between them This is what I wa...

I have configured 2x 500G sata HDD as Software RAID1 with three partitions md0,md1 and md2 with md2 as 400+ gigs Now it is almost 36 hours the status is cat /proc/mdstat Personalities : [raid1] md0 : active raid1 hdb1[1] hda1[0] 104320 blocks [2/2] [UU] resync=DELAYED md1 : active raid1 hdb2[1] hda2[0] 4096448 blocks [2/2] [UU] resync=DELAYED md2 : active raid1 hdb3[1] hda3[0] 484182912 blocks [2/2] [UU] [==========>.......

CentOS 6.3, x86_64. I have noticed when building a new software RAID-6 array on CentOS 6.3 that the mismatch_cnt grows monotonically while the array is building: # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] md11 : active raid6 sdg[5] sdf[4] sde[3] sdd[2] sdc[1] sdb[0] 3904890880 blocks super 1.2 level 6, 512k chunk, algorithm 2 [6/6] [UUUUUU] [==================>..] resync = 90.2% (880765600/976222720) finish=44.6min speed=35653K/sec # cat /sy...