> Hardware raid, the IBM serveraid ips, has tools under linux to add
> drives on the fly,
Hrm, I wasn't able to find anything on this. URL?
> I belive that when I played with the dpt you could add drives, via dos.
This is an Alpha-based system. Having to boot into DOS is, basically, not
an option.
> also would realy should have a DLT tape drive,
We have two 25/50G AIT tape drives, however...
> so you can back up to
> tape, then nuke the array add more drives , restore from tape
...this is easier said than done. (And mostly a hack.) We have live MySQL
databases on the array that average 20 INSERTs per second or so; it would
actually require taking the array offline anyway. The length of time to
dump to tape, reconstruct the larger array, restore from tape is
unacceptable.
> RAID != BackUPS
Yes, I understand this. We are performing backups every night M-F.
> > * Provide redundancy
> that is what raid is all about
> also so you need to have tapes
> > * Provide speed
> Software raid 5, seems to be the fastest with the new kni stuff
And yet *not* provide flexibility by being able to add more disks? I find
this disappointing. Would the LVM stuff do what we need (redundancy and
flexibility especially)? Other hardware solutions?
/pg
--
Peter Green
Gospel Communications Network, SysAdmin
[EMAIL PROTECTED]
