meta device recover
I am running two solaris 10 /x86 servers which see via a fibre channel switch 5 RAIDs
and a total of 48 "disk" devices. On one of the servers there are 4 filesystems configured with between 4 - 8 TBytes capacity. One the other server there are 3 filesystems configured.
3 of the 4 and the 3 of the 3 filesystems are created using lvm and striping over
two RAID systems each.
This works a treat and is fast.
Recently one of the Raids developed a controller problem and had to be replaced.
All precaution were taken to make sure that all of the NVRAM configuration data were
saved on disk and re-loaded onto the new RAID. However when the fileservers were
booted up the 11 "devices" offered by the replacement RAID had changed. and the
metadevices could not be rebuilt.
There are still 11 devices; I can clearly identify the ones were the names were changed
and I have md.dat file with the "old" configuration. Could I carefully edit the
md.dat file replacing the names of the devices offered by the replaced RAID with the new
names? and could I use a metacommand on this md.dat file to re-import the metadevices without jeopardizing the data. If I can and people know about the procedure I would be grateful if this you could tell me.
The replacement RAID and the second RAID participating in the stripes are all in full
working order and deemed as "good".
format0. c1t0d0 <DEFAULT cyl 4455 alt 2 hd 255 sec 63>
/pci@0,0/pci1022,7450@a/pci9005,286@2/sd@0,0
1. c6t600D0230006A5D7A0A550B64D149980Ad0 <DEFAULT cyl 43984 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d149980a
2. c6t600D0230006A5D7A0A550B64D1499800d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499800
3. c6t600D0230006A5D7A0A550B64D1499801d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499801
4. c6t600D0230006A5D7A0A550B64D1499802d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499802
5. c6t600D0230006A5D7A0A550B64D1499803d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499803
6. c6t600D0230006A5D7A0A550B64D1499804d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499804
7. c6t600D0230006A5D7A0A550B64D1499805d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499805
8. c6t600D0230006A5D7A0A550B64D1499806d0 <DEFAULT cyl 63739 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499806
9. c6t600D0230006A5D7A0A550B64D1499807d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499807
10. c6t600D0230006A5D7A0A550B64D1499808d0 <DEFAULT cyl 42072 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499808
11. c6t600D0230006A5D7A0A550B64D1499809d0 <DEFAULT cyl 42072 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d7a0a550b64d1499809
12. c6t600D0230006A5D9E0C25552F7DCF8E0Ad0 <DEFAULT cyl 43984 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d9e0c25552f7dcf8e0a
13. c6t600D0230006A5D9E0C25552F7DCF8E00d0 <transtec-T6100F24R1-E-347B-976.56GB>
/scsi_vhci/disk@g600d0230006a5d9e0c25552f7dcf8e00
14. c6t600D0230006A5D9E0C25552F7DCF8E01d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d9e0c25552f7dcf8e01
15. c6t600D0230006A5D9E0C25552F7DCF8E02d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d9e0c25552f7dcf8e02
16. c6t600D0230006A5D9E0C25552F7DCF8E03d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
/scsi_vhci/disk@g600d0230006a5d9e0c25552f7dcf8e03
17. c6t600D0230006A5D9E0C25552F7DCF8E04d0 <DEFAULT cyl 63738 alt 2 hd 255 sec 126>
...
...
IN the following md,dat file (which I made readable for this purpose by putting each device on a separate line )
the first 4 devices in each of the sets would have to be replaced with a modified
device name. where c6t600D0230006A29610A249403E28A8D0
would have to be replaced by c6t600D0230006B37C60A249403E28A8D0
cat md.dat
data1/d1 1 8
/dev/dsk/c6t600D0230006A29610A249403E28A8D00d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D01d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D02d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D03d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614400d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614401d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614402d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614403d0s0 -i 256b
data2/d1 1 8
/dev/dsk/c6t600D0230006A29610A249403E28A8D04d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D05d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D06d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D07d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614404d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614405d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614406d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614407d0s0 -i 256b
fcnew/d1 1 4
/dev/dsk/c6t600D0230006BB56D0A296548E2550200d0s0
/dev/dsk/c6t600D0230006BB56D0A296548E2550201d0s0
/dev/dsk/c6t600D0230006BB56D0A296548E2550202d0s0
/dev/dsk/c6t600D0230006BB56D0A296548E2550203d0s0 -i 256b
data3/d1 1 6
/dev/dsk/c6t600D0230006A29610A249403E28A8D08d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D09d0s0
/dev/dsk/c6t600D0230006A29610A249403E28A8D0Ad0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614408d0s0
/dev/dsk/c6t600D0230006A5D990F54325A25614409d0s0
/dev/dsk/c6t600D0230006A5D990F54325A2561440Ad0s0 -i 256b
