Hi everyone! First of all, many thanks to the following people for their informative and useful responses: Rob Forsey Darren Moulding Tony Walsh Eric Shafto Wayne McCormick Darren Dunham Deborah Crocker Charlie Giannetto Christopher Ciborowski Joe Serra Doug Otto Mailing List (???) Vipin Sharma I'll briefly summarize the two main points people made: 1) Volume Manager is only presented with LUN's and as a result, is not able to see an individual disk failure in a RAID 5 configuration. My concern however stemmed from the results of tests we performed on a RAID 0 configuration whereby the entire LUN did fail (as you would expect) when a single disk failed. However, with the RAID 5 configuration, the T3 brings in the hot spare and begins rebuilding the LUN automatically and completely transparently as far as VM is concerned. The only concern voiced was that there may be an impact on performance. 2) The T3's can be configured as "partnered pairs" which enables you to use the VM DMP feature. I don't know enough about T3's but this sounds very much like multi-pathing on Clariion arrays. I might be completely wrong about that one though so I'd recommend checking up on that if not sure! Just to see this all for myself, I pulled a disk from one of the T3's in a RAID 5 configuration and yes, VM chugged away merrily whilst the T3 brought in the hot spare and started building on that. VM was indeed completely oblivious to the "failure" and no problems encountered. So I was quite a happy bunny really! *Boing* Callum A. Hughes Unix Systems Engineer e: callum.hughes@sis.securicor.co.uk ********************************************************************** The information contained in this e-mail message is intended only for the individuals named above. If you are not the intended recipient, you should be aware that any dissemination, distribution, forwarding or other duplication of this communication is strictly prohibited. The views expressed in this e-mail are those of the individual author and not necessarily those of Securicor Information Systems Limited. Prior to taking any action based upon this e-mail message you should seek appropriate confirmation of its authenticity. If you have received this e-mail in error, please immediately notify the sender by using the e-mail reply facility. ********************************************************************** _____________________________________________________________________ This message has been checked for all known viruses on behalf of Securicor Information Systems by the MessageLabs. For further information visit http://www.messagelabs.com or Email: mailsweeper.info_at_sis.securicor.co.uk _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Tue May 7 05:57:23 2002
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