To make a small correction to what's below, you do not have to read the same sector from every other drive to write to one drive.  You only have to read the sector you are writing to and  the corresponding parity sector.  So, there's still a penalty, but not as large as what's suggested below.

On 11/27/05, Stephen Ryan <[EMAIL PROTECTED] > wrote:
On Sun, 2005-11-27 at 01:50 -0800, trebejo wrote:
> I'm surprised at how little you guys care for the RAID 5 idea.
...

You should be aware that there is a performance penalty for using RAID5;
every time you write a sector to disk, you must read the same sector
from each of the other drives in your array and recompute the checksums.
For a music library that doesn't change much (i.e., many more reads than
writes), you won't pay too much of a penalty for using RAID5.   If you
intend to use the headless server for other applications as well, it may
be worth investigating either RAID 1 or RAID 0+1 instead (RAID 0 is, I
think, worse than useless, but it looks like you already know that).


_______________________________________________
Discuss mailing list
[email protected]
http://lists.slimdevices.com/lists/listinfo/discuss

Reply via email to