Re: [gentoo-user] mdadm fails to add drive to arry

[Richard Broersma Jr <rabroersma@yahoo.com>]

> Ok, maybe stupid questions time.
> 
> /dev/hdj1 does exist, right?

yes

> Is this the same drive that was once part of the array? 

It is existing.  But possible it may have legitamatly failed. Here is a log generated today when I
tried to add it back into the array.
Sep  2 09:11:02 [kernel] end_request: I/O error, dev hdj, sector 586099263
Sep  2 09:11:02 [kernel] Buffer I/O error on device hdj1, logical block 146524800
...
Sep  2 09:11:02 [kernel] lost page write due to I/O error on hdj1
Sep  2 09:11:02 [kernel] end_request: I/O error, dev hdj, sector 586099263
Sep  2 09:11:02 [kernel] md: disabled device hdj1, could not read superblock.
Sep  2 09:11:02 [kernel] md: hdj1 has invalid sb, not importing!
Sep  2 09:11:02 [kernel] md: md_import_device returned -22


> If the same drive, does it work if you do "mdadm --zero-superblock
> /dev/hdj1" first?

~ # mdadm --zero-superblock /dev/hdj1
mdadm: Unrecognised md component device - /dev/hdj1



> What does "mdadm --examine /dev/hdj1" report?  How about for /dev/hdg1?


~ # mdadm --zero-superblock /dev/hdj1
mdadm: Unrecognised md component device - /dev/hdj1

~ # mdadm --examine /dev/hdj1
mdadm: No md superblock detected on /dev/hdj1.
db_server01 ~ # mdadm --examine /dev/hdg1
/dev/hdg1:
          Magic : a92b4efc
        Version : 00.90.03
           UUID : d77079f9:c084dedf:ba141e09:96726a79
  Creation Time : Tue May 30 19:48:40 2006
     Raid Level : raid1
    Device Size : 293049600 (279.47 GiB 300.08 GB)
     Array Size : 293049600 (279.47 GiB 300.08 GB)
   Raid Devices : 2
  Total Devices : 1
Preferred Minor : 4

    Update Time : Fri Sep  1 20:52:33 2006
          State : clean
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0
       Checksum : 2cbf93d9 - correct
         Events : 0.1402072


      Number   Major   Minor   RaidDevice State
this     1      34        1        1      active sync   /dev/hdg1

   0     0       0        0        0      removed
   1     1      34        1        1      active sync   /dev/hdg1

Does all of this suggest a complete and total drive failure? :-)  I orginally built this md4 array
as a Raid 5 from three of the cheepest drives that I could find (Maxtors).  Then a couple of
months later, one drive died.  So I converted the remaining to into a raid 1.  Now this one seems
to have died.  I guess I am learning my leason about buying cheep hardware.  Fortunately I have a
back-up of everything on this array.
 
 
Regards,

Richard Broersma Jr.
-- 
gentoo-user@gentoo.org mailing list