Good point, Joseph - years of working in an almost pure Windows environment does jade one's perspective to a degree. I was in fact specifically referring to Windows based software RAID - should have mentioned that. Thanks for keeping me honest!
Cheers, Jonathan L. Raper, A+, MCSA, MCSE Technology Coordinator Eagle Physicians & Associates, PA [email protected]<BLOCKED::mailto:%[email protected]> www.eaglemds.com<BLOCKED::http://www.eaglemds.com/> ________________________________ From: Joseph L. Casale [mailto:[email protected]] Sent: Wednesday, June 24, 2009 11:11 AM To: NT System Admin Issues Subject: RE: HDD spindle speed RAID Depends very much on the type of raid, and size of write etc and the logic the raid controller uses. The whole array generally won't slow down unless it's a strip. If it's an r{5|6} array, it depends if the read/write uses a block on that disc or not. Such as the case where a write needs to read the block before then write its data and update the parity info, if any of that falls on a slow disc, there's your bottleneck. Same goes for HW or SW raid. FWIW based on that comment of SW raid being crappy that may be the case for Windows Dynamic Discs (Never even used them), but an entire enterprise community of Linux and Solaris ZFS users would argue rather firmly against that comment. jlc From: David Lum [mailto:[email protected]] Sent: Wednesday, June 24, 2009 8:46 AM To: NT System Admin Issues Subject: HDD spindle speed RAID Does matching HDD spindle speed matter when you are RAID-ing arrays? Can you have RAID 1 with a 10,000rpm drive and a 7200RPM one? The controller just adjusts when it's waiting to know both drives are ready for more data, right? Somehow I seem to think they need to match - is it only specific conditions? Hardware raid vs software perhaps? Only stuff other than RAID 0 or 1? Or was the crack I smoked still having an effect? Bueller? David Lum // SYSTEMS ENGINEER NORTHWEST EVALUATION ASSOCIATION (Desk) 971.222.1025 // (Cell) 503.267.9764 ________________________________ Any medical information contained in this electronic message is CONFIDENTIAL and privileged. It is unlawful for unauthorized persons to view, copy, disclose, or disseminate CONFIDENTIAL information. This electronic message may contain information that is confidential and/or legally privileged. It is intended only for the use of the individual(s) and/or entity named as recipients in the message. If you are not an intended recipient of this message, please notify the sender immediately and delete this material from your computer. Do not deliver, distribute or copy this message, and do not disclose its contents or take any action in reliance on the information that it contains. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
