Hello managers,
This is a little summary of answers sent to me about allocate the
operating system in a RAID array.
If any body wants to get all origial messages, please, contac with me at
<csanchez_at_cirp.es>.
Thank you very much to:
Dave Golden <golden_at_falcon.invincible.com>
Edward C. Bailey <ed_at_pipdog.niehs.nih.gov>
Kurt Carlson <SXKAC_at_orca.alaska.edu>
Allan Small <asmall_at_isu.usyd.edu.au>
Somebody (deamon) from nabeth.cxo.dec.com
for their more than good answers.
1. There are many systems where O/S is allocated in a RAID array (at any
level). DEC Spain said: No problems.
2. Which is the better RAID level? I don't know, but Allan Small sent me
a table about performance an data security on the RAID levels:
performance
read write redundancy relative cost
RAID0 high high none low
RAID1 mid-high mid-low high high
RAID0+1 high mid high high
RAID5 mid-low low mid mid
So, I repeat what Edward C. Bailey said: "... We normally put six drives
in a shelf, and mirror (RAID 1) the first two for the O/S and RAID 5 the
rest. With five or more disks, I think that it is a good idea.
A note: when I say O/S, I am talking about /root, /usr, /var and swap
partitions.
By the way, each machine is a world, and each one must monitorize the
disk/s usage and thinks about it.
It could be good the RAID 1 and RAID 5 solution and try to balance the
writes on them moving files.
Thanks to all. I hope this help you.
Best regards,
--
J. Carlos Sanchez Rivas <csanchez_at_cirp.es>
Responsable de Sistemas Hardware
Centro de I.L.L. Ramon Pi~neiro, GALICIA (SPAIN)
Received on Fri Aug 30 1996 - 13:58:54 NZST