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Misu Egri's questions

Martin Hope
Misu Egri
Asked: 2015-06-04 11:59:41 +0800 CST
  • 0

I have been running ZFS Raid1z with 5 disk under Ubuntu 12.04 for 3 years now with no problems at all.
Unfortunately the day of failing disk has come. I have lost a disk in the array, he simply went offline and after a few days the second one started to drop errors as well. As the system detected check sum errors on the second disk that has started to fail (some bad sectors according to SMART) it started to re-silver the array and when i got to the PC and saw the re-silvering was already at 40%, in order to avoid a catastrophe I have decided to stop the server asap.

So basically my array looks like almost like this, and somewhere it is mentioned that data's were lost : 

NAME                                    STATE     READ WRITE CKSUM
Misu                                    DEGRADED     0     0     0
  raidz1-0                              ONLINE       0     0     0
    scsi-SATA_ST3000DM001-9YN_Z1F1587B  OFFLINE      0     0     0   (failed hdd)
    scsi-SATA_ST3000DM001-9YN_Z1F14J7V  ONLINE       0     0     0
    scsi-SATA_ST3000DM001-9YN_Z1F14JYL  ONLINE       0     0     0
    scsi-SATA_ST3000DM001-1CH_W1F1G04F  ONLINE       0     0     0
    scsi-SATA_ST3000DM001-1CH_W1F1G1H7  ONLINE       134   5     139 (failing hdd)

Since the resilver process take some time i'm quite afraid of replacing the first disk and hope that the second one, the one that has checksum errors will not fail. So i have decided to replace the PCB on the first failed disk since it had pcb problems and not mecanical problems.

So, if i manage to make the first disk running what shall i do next, how will zfs know that the disk was not replace (not sure but i believe that changing the pcb will change the serial number and stuff for that disk) and detect the disk as the original member?

Any other information that can help me not to make this worse?

12.04
Martin Hope
Misu Egri
Asked: 2013-08-10 00:27:45 +0800 CST
  • 2

I have a weekly script that cron runs to make a zfs snapshot. I was wondering if it is possible to mail a OK mail if the job run correctly and a error mail if something happened and in the content of the mail to have the job log. How to do this? 

25 11 * * 5 /home/aegrimisu/ZFS-autosnapshot.sh>>/home/aegrimisu/ZFS-WeeklySnapShot.log 2>&1 | mail -s "ZFS SnapShot Status" [email protected]

The script content is :

#!/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
zfs snapshot Misu@Misu-`date +%Y.%m.%d-%H:%m:%S`
12.04
Martin Hope
Misu Egri
Asked: 2013-07-22 03:14:12 +0800 CST
  • 0

I inted one of my disk from the lower raid1z setup and i was wondering what is the best way to do it, what a re the steps.

    NAME                                    STATE     READ WRITE CKSUM
    Misu                                    ONLINE       0     0     0
      raidz1-0                              ONLINE       0     0     0
        scsi-SATA_ST3000DM001-9YN_Z1F1587B  ONLINE       0     0     0
        scsi-SATA_ST3000DM001-9YN_Z1F14J7V  ONLINE       0     0     0
        scsi-SATA_ST3000DM001-9YN_Z1F14JYL  ONLINE       0     0     0
        scsi-SATA_ST3000DM001-1CH_W1F1G04F  ONLINE       0     0     0
        scsi-SATA_ST3000DM001-1CH_W1F1G1H7  ONLINE       0     0     0

Will the lower command do the trick? do i have to do something more?

zpool offline Misu scsi-SATA_ST3000DM001-1CH_W1F1G04F

Shutdown and replace drive (i'm replacing the disk in the same slot so basicly the sd* shall be the same, even if is not the same i will change it accordingly)

zpool replace Misu scsi-SATA_ST3000DM001-1CH_W1F1G04F

zfs