Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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Hi all,
I have been using a DNS-323 with fw 1.03 with two disks for ages, under a RAID configuration.
I have just noticed a problem (writing to a specific directory does not work, the files are not copied at all, and I don't get an error).
The status page says everything is fine, I haven't got an email for degraded raid (test e-mail works), and no pink led in front of the DNS.
However, logging into the DNS, the logs have a different opinion:
EXT2-fs error (device md0): ext2_check_page: bad entry in directory #22822918: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
EXT2-fs error (device md0): ext2_readdir: bad page in #22822918
...
SCSI error : <0 0 0 0> return code = 0x8000002
sda: Current: sense key=0x3
ASC=0x0 ASCQ=0x0
Info fld=0x23f46f39
end_request: I/O error, dev sda, sector 603221778
SCSI error : <0 0 0 0> return code = 0x8000002
sda: Current: sense key=0x3
ASC=0x0 ASCQ=0x0
Info fld=0x23f46f6c
end_request: I/O error, dev sda, sector 603221786
Operation continuing on 1 devices
raid1: sda2: rescheduling sector 602161488
raid1: sdb2: redirecting sector 602161488 to another mirror
SCSI error : <0 0 0 0> return code = 0x8000002
sda: Current: sense key=0x3
ASC=0x0 ASCQ=0x0
Info fld=0x23f4700a
end_request: I/O error, dev sda, sector 603222026
raid1: sda2: rescheduling sector 602161736
RAID1 conf printout:
--- wd:1 rd:2
disk 0, wo:1, o:0, dev:sda2
disk 1, wo:0, o:1, dev:sdb2
RAID1 conf printout:
--- wd:1 rd:2
disk 1, wo:0, o:1, dev:sdb2
raid1: sdb2: redirecting sector 602161736 to another mirror
cat /proc/mdstat
Personalities : [linear] [raid0] [raid1]
md0 : active raid1 sdb2[1] sda2[2](F)
730860992 blocks [2/1] [_U]
unused devices: <none>
The raid is clearly degraded. Disk /dev/sda has failed. But which is /dev/sda? The disk on the left, or the disk on the right?
hdparm -i does not work on drives:
hdparm -i /dev/sda
/dev/sda:
hdparm: HDIO_GET_IDENTITY: Invalid argument
I am going to replace both disks (with 2 2TB), and I want to know which of the two disks to use for copying the data back.
Any ideas?
George
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I think sdb is faulty?
It should be the disk on the left, to verify run smartctl to get the S/N.
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It was /dev/sda that was faulty. Assuming that the right bay (which is Disk 0 according to the board) is /dev/sda, I used the disk in the left bay (assuming it was /dev/sdb) for copying data back to the new disks.
It worked fine, I only got two errors, on a single file and on a folder, which could not be read. These two were the files/folder that I couldn't copy at the DNS, and notified me that there is a problem with the disks.
I used "cp -a" to copy the data, plugging the old disk through usb. It took more than 15 hours to copy 500 GB of data though...
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