You need even numbers of the same size drives for mirroring. The base (low-end) controller that might be found in a 170 will support mirroring but NOT Raid5. Your plan is probably the simplest to do. That is add the expansion and more drives. Today I would just add 3 more 8's and the expansion. Another option that would probably be better to do is this...No expansion needed I'm assuming the Loadsource is a 4gb drive If your current card doesn't support Raid5, Replace it (they are cheap these days) Place a new 8gb in the 4th slot and use DST to copy the loadsource to it. Pull the loadsource out and place the new 8gb in it's place. Now use DST to remove the other 4gb drive which will migrate all the data off of it. Replace it with and 8gb add the 4th 8gb drive. Build Raid5 and then add them to the ASP. If the loadsource is an 8gb then... Add one 8gb to the ASP Use DST to logically remove the two 4gb drives Replace then with 8s, add the 4th 8gb Add to the ASP and build Raid5 _____________________ Kirk Goins Systems Engineer, Manage Inc. IBM Certified in i5 Solution Sales, i5 Technical Solutions Expert V5R4, iSeries Multiple Systems Administrator V5R3, Systems Expert - i5 LPAR Technical Solutions V5R3 Office 503-353-1721 x106 Cell 503-577-9519 kirkg@xxxxxxxxxxxxx www.manageinc.com Email Response Times: Same Day Maybe, Next Day Probably "Douglas W. Palme" <dpalme@xxxxxxxxxxx> Sent by: midrange-l-bounces+kirkg=manageinc.com@xxxxxxxxxxxx 11/05/2006 09:01 PM Please respond to Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx> To "'Midrange Systems Technical Discussion'" <midrange-l@xxxxxxxxxxxx> cc Subject RE: Adding parity and mirroring to a 170 So if I am to understand you correctly, adding the 7102 expansion unit, all I have to do to add mirroring is add another 2 4gb drives and 1 more 8 and I will be able to mirror them out correct? Or do they ALL need to be the same size? -----Original Message----- From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James H H Lampert Sent: Sunday, November 05, 2006 10:50 PM To: Midrange Systems Technical Discussion Subject: Re: Adding parity and mirroring to a 170 "Douglas W. Palme" <dpalme@xxxxxxxxxxx> wrote:
we will have to add a raid controller card
Uh, so far as I'm aware, 170s (and 40s-es and 510s) are RAID-ready out of the box. All you need for mirroring is an even number of each size/model of drive. And all you need for parity is enough of each size/model to make a parity set. So far as I'm aware, there is no special controller card required. Which is to say that we have a 40s, a slim 170, a fat 170, and a 510, and they're all mirrored, and we didn't have to buy anything to do it, other than drives. -- JHHL -- 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.