I had to add some additional DASD to a Linux instance over the
weekend, and for whatever reason, it turned into a disaster.
Linux somehow or another decided to rearrange all the DASD and blew
every single LVM I had on the machine. Just under half a terabyte of
data went into some unrecoverable mode.
I'm pretty careful about this, and just build ~100GB volumes using
3390-9 volumes. The mini-disk definitions are always ordered and new
DASD gets higher, sequential numbering. I always start my minidisk
assignments at 200, so 200 is the IPL disk, 201 is either /usr or
swap, depending. 202 starts the data volumes.
I wound up building a new instance, and installing a slightly updated
version of Linux, then restoring all the data with Tivoli from a VTL.
There was no permanent damage done, except to my ability to sleep at
night.
When I rebuilt the data partitions, I built them as RAID-0 partitions.
(The Shark takes care of the real RAID, and I am not worried about
data loss from that direction.)
Has anyone else ran into this?
-Paul
