[mythtv-users] OT Help: mdadm segfault
scram69 at gmail.com
Tue Sep 18 16:42:18 UTC 2007
On 9/18/07, George Mari <george_mythusers at mari1938.org> wrote:
> Steve MacLaren wrote:
> > On 9/17/07, George Mari <george_mythusers at mari1938.org> wrote:
> >> Please post the output of each of the following:
> >> mdadm --examine /dev/sda1
> >> mdadm --examine /dev/sdb1
> >> mdadm --examine /dev/sdc1
> >> mdadm --examine /dev/sdd1
> >> I'm guessing that /dev/sda1 will report no valid info or some such, but
> >> if the other 3 drives all have same/similar values for the 'events'
> >> field, you should be able to recover.
> > Here's what I get:
> > /dev/sda1:
> > Magic : a92b4efc
> > Version : 00.90.00
> > UUID : bc7a4d90:bd286a91:c109596b:d7e29b7e
> > Creation Time : Mon May 7 21:31:55 2007
> > Raid Level : raid5
> > Device Size : 488383872 (465.76 GiB 500.11 GB)
> > Array Size : 1465151616 (1397.28 GiB 1500.32 GB)
> > Raid Devices : 4
> > Total Devices : 4
> > Preferred Minor : 0
> > Update Time : Wed Sep 12 15:58:54 2007
> > State : active
> > Active Devices : 4
> > Working Devices : 4
> > Failed Devices : 0
> > Spare Devices : 0
> > Checksum : 66008fbc - correct
> > Events : 0.161
> Do all the other drives have the same value for this field above,
> "Events"? (Are they all 0.161?) If all four are the same, then the data
> on your array is intact. If at least three of the four are the same,
> you will be able to re-build the array from the three good drives. The
> one that has a different value got kicked out of the array.
> > Layout : left-symmetric
> > Chunk Size : 128K
> > Number Major Minor RaidDevice State
> > this 0 8 1 0 active sync /dev/sda1
> > 0 0 8 1 0 active sync /dev/sda1
> > 1 1 8 17 1 active sync /dev/sdb1
> > 2 2 8 33 2 active sync /dev/sdc1
> > 3 3 8 49 3 active sync /dev/sdd1
> So what this above says is, "according to the superblock info on *this*
> drive, the state of each drive in the array is 'active sync'".
> When you do mdadm --examine /dev/sd*1 on each of the other three drives,
> if they all report the same information (all drives 'active sync') your
> array is fine.
> If this is the case, I agree with the other poster that you may have a
> hardware problem elsewhere, such as power supply.
> Of course, even if the array does have a problem with one drive, it
> still could be that something like a power supply problem could be
> causing your array to fail.
> mythtv-users mailing list
> mythtv-users at mythtv.org
Yes, all four of the "Events" fields came up as 0.161. And the states were
all active sync. So we'll give a new PSU a try-
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