Re: failing & corrupt hdisks & mirror... restore VG's from tape?

p595pimp wrote:
On Feb 26, 11:35 pm, "Michael W. Ryder" <_mwry...@xxxxxxxxxxxxxxxx>
wrote:
p595pimp wrote:
Wow, thanks for your in-depth response, man, it was very helpful. i'll
tell you what happened:
i removed the definitions of the failing hdisks (1 & 4) with rmdev
commands,
brought the system down, physically removed the disks,
installed the new disks in same slots as old disks,
brought the system up & ran cfgmgr (this was wierd, as it labeled the
disks hdisk6 & hdisk7, even though i had remevoed their def's from the
odm),
exported the vg01 volume group that was on the failed disks,
recreated vg01 on the new hdisks (same pv size, same pp sizes),
tried to restore vg01 from the tape backup that we had (tape backup
included the whole system, which had 2 uservg's; vg01 & vg02).. .tried
using restvg for this, and various smitty restvg, smitty lvm methods
of restoring this VG (vg01) from the tape... but all i would get was
an error:
0512-025 restvg: The image data file does not exist. Restore of
Volume Group cancelled.
anybody have any ideas?
Thanks,
-P
If the data was placed on the tape using a regular backup command you
should be able to do a regular restore. Use 'restore -T' to see if the
files are on the tape.

thanks' i'll try that in the morning and let you know how it goes.
i'm not sure how the backups were created, they seem to outsource ALL
of their IT stuff... I'll find out though, assumed savevg -> restvg,
didnt think of old backup -> restore method. guess i should have as
nothing has been updated or patched on this machine in almost 10
years!
thanks!
-P

BUT also... say that the tape IS valid, (and not, i really hope, just
a mksysb or something), but say it IS valid, and has backups of
rootvg, and both the uservgs, vg01 & vg02...(vg01 is the one that
needs restored)...
now...
does restore (or restvg for that matter) know to seek out the
particular VG thats missing from the target system? in other words, i
cant find anything in the AIX 4.3 man pages for restvg or restore that
has an argument for targeting just ONE of the uservg's (like our
missing vg01)on a tape backup.
i mean, i recreated the vg... vg01, on the 2 new hdisks i installed,
so how does restvg know what specific vg & data to restore?
its late, and i'm tired and don't know if i'm explaining this right,
but do you understand what i mean?
your help is much appreciated.
thanks,
-P


If the tape was created using the backup command you would restore the volume groups by specifying the directories in the volume groups. If the volume group had directories data1 and data2 you would use something like 'restore -xvf /dev/rmt0 /data1 /data2' to restore the data.
.

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