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Mirroring is significantly more reliable, but IBM is scamming you if they tell you it's the same price for disk. You will use significantly more slots, bays, controllers and maintenance. Al Al Barsa, Jr. Barsa Consulting Group, LLC 400>390 "i" comes before "p", "x" and "z" e gads Our system's had more names than Elizabeth Taylor! 914-251-1234 914-251-9406 fax http://www.barsaconsulting.com http://www.taatool.com http://www.as400connection.com Brian <iserieslists@gma il.com> To Sent by: Midrange Systems Technical midrange-l-bounce Discussion s@xxxxxxxxxxxx <Midrange-L@xxxxxxxxxxxx> cc 08/18/2005 10:09 Subject AM Performance of 2780 controller and 141GB drives Please respond to Midrange Systems Technical Discussion <midrange-l@midra nge.com> Any experience with consolidating DASD on the new 141GB drives out there? On the new box we are ordering it has been suggested that we move from a RAID environment to a mirrored environment. However, to be affordable, this would mean consolidating the data storage onto fewer drives. Being from the old school of "small drives and lots of arms", I am skeptical of the performance of this configuration. The current configuration on our 730 consists of two RAID sets, one with 20 8GB 10K drives and the other with 16 17GB 10K drives. This gives ~400GB on 36 arms. The proposed configuration for the i5 520 is for mirroring at the IOP level using the fast 2780 controllers with a total of 16 141GB drives plus 2 35GB drives as mirrored load source in the CEC. This gives ~1TB of usable data storage. Any opinions? Suggestions? Kind regards, Brian -- This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/midrange-l or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/midrange-l.
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