[SOLVED] SATA vs SAS SAN drives

[padraig]

Hi All,

When purchasing a SAN for zimbra which disk types do zimbra recommend
SATA or SAS

[phoenix]

Originally Posted by padraig

When purchasing a SAN for zimbra which disk types do zimbra recommend
SATA or SAS

It would be a general comment of no SATA but check the wwiki article: Performance Tuning Guidelines for Large Deployments - Zimbra :: Wiki

[padraig]

Thanks Bill,

I guess RAID50 is the recommended RAID setup
its not in the wiki?

p.

[phoenix]

I would have said RAID10 (plus hot spares) as I believe RAID50 would still suffer from the same write performance problem that RAID5 does.

[dave_kempe]

RAID10 and lots of buffer cache would make more difference than SATA vs SAS, but that being said I was getting 400Mb/s in benchmarks on a SAS RAID 10 array on a local hardware RAID controller. This was on a new Sun server can't remember the model number. Thats gotta be the fastest sustained benchmarking figure I have see in a while. This was on writes. On reads it could sustain 500Mb/s.