>But once you've defined a bunch of 'small' drives, won't OS/400 >simply dump them into the (designated) ASP, and make them available >as part of the Single Level Store? Yup. Of course the annoying thing is that I have to define a UDFS to allow IFS to use the storage if it's not in the system ASP. >IIRC, there was talk about the 'problem' of dealing with OS/400 and >SANs-- OS/400 takes all the space available to it and adds it to the >S.L.S., which is not the way PCs work-- PCs grab space as needed. PCs do the same thing as the iSeries. If I define 10 LUNs (logical drives on the SAN) at 100G each I've "used" up 1TB of that SAN. It doesn't matter if I store 1TB of data on that space or 1 byte of data, it's committed to the machine that mounts the LUNs. Of course, if I only needed 100G I'd only mount one LUN and then come back later and mount a second when I need it. But that's no different than adding drives to the iSeries as needed. Of course, the thing I don't get is RAID on the SAN. The SAN redbook (http://publib-b.boulder.ibm.com/Redbooks.nsf/RedbookAbstracts/sg246220. html?Open) seems to imply that I would start parity protection for the "drives" so that OS/400 RAID-5s them. That makes no sense to me since most larger SAN units take responsibility for RAID themselves at the hardware level (under the LUNs) -Walden ------------ Walden H Leverich III President & CEO Tech Software (516) 627-3800 x11 WaldenL@xxxxxxxxxxxxxxx http://www.TechSoftInc.com Quiquid latine dictum sit altum viditur. (Whatever is said in Latin seems profound.) -----Original Message----- From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of PaulMmn Sent: Thursday, March 18, 2004 8:27 AM To: midrange-l@xxxxxxxxxxxx Cc: Sue Baker Subject: Re: SAN Attached to iSeries - Anyone? But once you've defined a bunch of 'small' drives, won't OS/400 simply dump them into the (designated) ASP, and make them available as part of the Single Level Store? IIRC, there was talk about the 'problem' of dealing with OS/400 and SANs-- OS/400 takes all the space available to it and adds it to the S.L.S., which is not the way PCs work-- PCs grab space as needed. --Paul E Musselman PaulMmn@xxxxxxxxxxxxxxxxxxxx >Walden H. Leverich wrote: > >> Do we >> have to define the space as lots of small drives, or will the >> iSeries support a single 2TB drive? >> > >Yes, you have to use multiple "small" drives. Any external >storage device must emulate the valid physical device sizes. >With V5R2, valid sizes are 8.5, 17.5, 35.12, 36, and 70 GB. > >-- >Sue >iSeries Advanced Technical Support >Rochester, MN _______________________________________________ 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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