Hi list<br><br>We had a problem with our OST few days ago ( i also posted my question here ), after rebuilding our RAID partition, we use drbd to re-synchronize our data from active OST to this backup one. We just started drbd from OST ( which has been rebuild RAID partition ) and connect with drbd on an working OST. Everything was fine and the synchronization completed without any error report. But, when we mount this backup OST in to our system, some of web client can't connect to it ( MDS and some others can ) and after a short time, in that OST message log, we see many error report like this : <br>
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</style><i><span style="font-family: arial,helvetica,sans-serif;">Nov 19 19:59:36 OST6
kernel: LDISKFS-fs error (device drbd6): ldiskfs_lookup: unlinked inode
159588368 in dir #261333022</span><br><br style="font-family: arial,helvetica,sans-serif;"><span style="font-family: arial,helvetica,sans-serif;">Nov 19 19:59:36 OST6
kernel: LustreError: 3893:0:(filter_lvb.c:90:filter_lvbo_init())
lustre-OST0006: bad object 996598/0: rc -2</span><br><br style="font-family: arial,helvetica,sans-serif;"><span style="font-family: arial,helvetica,sans-serif;">Nov 19 19:59:36 OST6
kernel: LustreError: 3893:0:(filter_lvb.c:90:filter_lvbo_init()) Skipped 7
previous similar messages</span><br><br style="font-family: arial,helvetica,sans-serif;"><span style="font-family: arial,helvetica,sans-serif;">Nov 19 19:59:36 OST6
kernel: LustreError: 3893:0:(ldlm_resource.c:858:ldlm_resource_add()) lvbo_init
failed for resource 996598: rc -2</span><br><br style="font-family: arial,helvetica,sans-serif;"><span style="font-family: arial,helvetica,sans-serif;">Nov 19 19:59:36 OST6
kernel: LustreError: 3893:0:(ldlm_resource.c:858:ldlm_resource_add()) Skipped 7
previous similar messages<br><br></span></i>
<p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><i><font size="2">Nov 19 19:59:40 OST6 kernel: LDISKFS-fs error (device
drbd6): ldiskfs_lookup: unlinked inode 261038084 in dir #261333008</font></i></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><i><font size="2">Nov 19 19:59:45 OST6 kernel: LDISKFS-fs error (device
drbd6): ldiskfs_lookup: unlinked inode 229924884 in dir #261333024</font></i></p>
<p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><i><font size="2">Nov 19 19:59:47 OST6 kernel: LDISKFS-fs error (device
drbd6): ldiskfs_lookup: unlinked inode 228163899 in dir #261333024</font></i></p>
<p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><i><font size="2">Nov 19 19:59:54 OST6 kernel: LDISKFS-fs error (device
drbd6): ldiskfs_lookup: unlinked inode 165830658 in dir #261333015</font></i></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2">I tried umount this drbd disk and use e2fsck to check it, it showed me that this disk is clean, but after re-mount, it went wrong once again</font></p>
<p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2">From now, i umounted it, and reformat this disk like this:</font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal">
<font size="2"><i style="font-family: arial,helvetica,sans-serif;">mkfs.lustre --reformat --verbose --writeconf --ost --mgsnode=192.168.1.78@tcp:192.168.1.80@tcp --failover=192.168.1.83@tcp --index=6 /dev/sdd</i></font></p>
<p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2">it completed without any error. And i'm trying resynchronize this drbd disk with an working OST node. It will take pretty long time. <br>
</font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2">And, after all, the question i want to rise here is: <br></font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal">
<font size="2">In order to using drbd as back up solution as i described above, do we need to reformat disk before synchronize data or just sync it directly ? <br></font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal">
<font size="2">Could you please give me an advice or suggestion in my situation ? <br></font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2">Thanks in advance <br></font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal">
<font size="2">Best regards </font><br></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><font size="2"><br></font></p><p style="font-family: arial,helvetica,sans-serif;" class="MsoNormal"><br></p>