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First of all the 6717 is a 8.58GB drive. When you RAID 5 a set, each drive is partitioned to hold data and striping for the other drives. That is why different configurations report different disk sizes. You will need a larger drive for your OS. Seems you do not need more storage since you are at only 57% so I would go with the 17.5Gb drives. They will work up to V5R3, I do not know the requirements for V5R4 or beyond. In order to stay protected, you will need have at least 4 drives of the same size. I would remove RAID from the set of 4 and then tell the system to stop using them. This can all be done live, but you will be unprotected for a day or so. If you can afford down time, you can do your backup in restricted state and start the data move while still in restricted state. You can then IPL to DST and remove the 4 drives, insert the 4 new drives, build a raid set, add to ASP, and finally migrate the load source. This is where I become unclear as to weather you need to physically move the load source back to the same slot as the original or not. Perhaps someone more experience can chime in. Christopher Bipes Information Services Director CrossCheck, Inc. -----Original Message----- From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Shaun Pearson Sent: Friday, June 16, 2006 7:31 AM To: midrange-l@xxxxxxxxxxxx Subject: Disk reconfiguration for upgrade Any advice please We are looking to upgrade OS on our 270 (currently V5R2) We believe we need a larger disk for our load source in order to do this, and are looking at moving to 17.5gb or 35gb disk drives. Our current disk config is as follows : Parity Set 1 4 * 6.4gb 6717 Parity Set 2 8 * 7.5gb 6717 (including load source) Physically we have 2 * 6 slot units. Both currently full. The first unit contains 4 drives from Parity Set 2 (including the load source) and 2 from Parity set 1 The second unit contains 4 drives from Parity Set 2 and 2 from Parity set 1 Current disk usage is 57% Is it possible, by some combination of removing existing drives, switching off parity, adding the new larger drives, to move load source to the larger disks whilst avoiding full restore ?
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