To get good random access (and sustained read/write) performance be sure to have command queuing (either TCQ or NCQ) - available, - configured and - working on all components used: Disk, controller and driver. The latest is particulary an issue with XP.
Still, similar 15 kRPM SCSI raid will easily outperform SATA, So the true question is whether you need the high (SCS, FC, ..) performance at high costs or not. We here estimated which sustained write rate we need, found a supplier who promised us (a much better) througput, so we made a contract with acceptancy check based, among other things, on the sustained write rate as well. The real write rate was much smaller than promised but still much higher than required, so we got an rebate and kept the 3 TB raid - and are happy with it. Best Juraj -----Ursprüngliche Nachricht----- Von: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Im Auftrag von Richard Rhodes Gesendet: Mittwoch, 11. Juli 2007 20:40 An: [email protected] Betreff: Re: SATA disk? "ADSM: Dist Stor Manager" <[email protected]> wrote on 07/11/2007 02:01:16 PM: > Has anyone used SATA drives for primary storage. Is it really a bad idea? I've been using some SATA disks for a primary staging pool for a few months. It was the only storage we had at the time . . . so I used it. This was SATA in a EMC Clariion. Config'ed as raid5 In general, I was quite happy with it's performance. Now . . .the BUT's . . . I grabed about 1tb across 30-40 lightly used spindles in multiple Raid5 raidsets. In other words, I had enough spindles to get the iops/throughput I needed. According to EMC's docs, these SATA disks are capable of around 60 iops. Rick ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message. Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
