No docs, but you want as many ports as possible for maximum throughput. Officially, you can put three drives per HBA port (through a switch, not Y cables). I tell customers that a maximum of two drives per HBA port will make them a LOT happier; three LTO4 drives could saturate the connection, and that's a bad thing with tape. -- Mark Stapleton ([EMAIL PROTECTED]) CDW Berbee System engineer 7145 Boone Avenue North, Suite 140 Brooklyn Park MN 55428-1511 763-592-5963 www.berbee.com
> -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf > Of Larry Peifer > Sent: Thursday, November 20, 2008 12:49 PM > To: [email protected] > Subject: [ADSM-L] IBM 3200 Tape Library SAS adapters > > We are in the process of purchasing an IBM 3200 Tape Library with 4 - > LTO4 > half-height SAS drives. Our IBM sales rep and tech support rep are > telling > us that we need 4 - 5912 HBAs, one for each drive, to support this > configuration in our IBM 9117-MMA (p570) host. > > From our review of the tech specs it looks like the 5912 Adapter (PCI-X > DDR > Dual -x4 SAS Adapter) should be able to support all four SAS tape > drives > from one card using 2- YO cables in the same way it can support 4 disk > drives. Can anyone point us to someone or some docs that can give us > more > information. > > Larry Peifer > San Onofre Nuclear Generating Station > AIX System Admin > TSM system Admin
