...anyone see any issues with having a dual-ported card, and using one port for disk access, and the other port for tape? I would think not, but Mgmt is questioning it...
Thanks, Steve Roder On Thu, 8 Feb 2007, Richard Rhodes wrote: > We also define one zone per host hba with all tape drives. Actually, since > we have multiple libraries, I do a separate zone for each hba+lib > combination. Yes, I've read and been told that a zone should only contain > one hba/device (tape drive, array adapter port). > > fyi: A very long time ago on our very first san (3 servers and a IBM shark > array) we didn't use zoning (didn't now any better!!!!). All hosts saw all > the IBM Shark adapters. We relied on lun masking so each host could see > only the proper luns. We didn't understand that each hba would check out > every other hba. When we had a san error it would register on all the > attached servers. Needless to say, we learned about zoning and started > using it!!! > > > > > > "Kauffman, Tom" > <[EMAIL PROTECTED] > COM> To > Sent by: "ADSM: ADSM-L@VM.MARIST.EDU > Dist Stor cc > Manager" > <[EMAIL PROTECTED] Subject > .EDU> Re: Tape drive zones for FC drives > - best practices > > 02/08/2007 10:39 > AM > > > Please respond to > "ADSM: Dist Stor > Manager" > <[EMAIL PROTECTED] > .EDU> > > > > > > > My TSM server has six HBAs for tape use and my 3584 has 16 tape drives. > These are configured as 8 tape drives and 3 HBAs each on two switches. > This gives me 11 aliases per switch. I have just three zones in each > switch, one for each HBA. All eight tape drives are defined to each > zone. I've been configured this way for 5 years and have yet to see a > problem. > > My aliases are a bit simple-minded -- tape_01 through tape_16 for the > tape drives, and things like 'columbia_1_2' for the tsm server (host > name columbia, I/O drawer 1, PCI slot 2). The zone names I use are based > on the HBA alias, so that would be zn_columbia_12 (and no, I don't know > what I'll do if I ever get a system with more than 9 I/O drawers :-). > > Tom Kauffman > NIBCO, Inc > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of > Schneider, John > Sent: Tuesday, February 06, 2007 6:05 PM > To: ADSM-L@VM.MARIST.EDU > Subject: Tape drive zones for FC drives - best practices > > Greetings, > My habit in regards to zoning FC tape drives has always been to > put > one host HBA in a zone with all the tape drives it should see, and to > have a > separate zone for each host HBA. For example, in a situation with 2 > host > HBAs and 10 tape drives, I would have two zones, one with one host HBA > and 5 > tape drives, and the other with the other host HBA and 5 tape drives. > Pretty simple. > > But an IBM consultant working here is telling me that the best > practice is to have a separate zone for each HBA/tape drive pair. So in > my > example above, I would have 20 zones instead of two. His claim is that > an > individual tape drive can hang all the other drives if they are in the > same > zone, but not if they are in separate ones. Has anyone seen this in > real > life? > > This becomes important to me because I am about to put in new > SAN > switches, and he wants me to follow this recommendation. I have 2 TSM > servers with 4 HBAs each, 4 NDMP nodes, and 14 tape drives. Using my > scheme, I would have 12 zones, with his scheme I would have 56 zones. > That > seems like a lot of zones, and unnecessarily cumbersome. > > Is it really necessary to isolate each HBA/Tape drive into a > separate zone? Do individual tape drives really hang other drives in > their > zone? > > Best Regards, > > John D. Schneider > Sr. System Administrator - Storage > Sisters of Mercy Health System > 3637 South Geyer Road > St. Louis, MO. 63127 > Email: [EMAIL PROTECTED] > Office: 314-364-3150, Cell: 314-486-2359 > CONFIDENTIALITY NOTICE: This email and any attachments are for the > exclusive and confidential use of the intended recipient. If you are not > the intended recipient, please do not read, distribute or take action in > reliance upon this message. If you have received this in error, please > notify us immediately by return email and promptly delete this message > and its attachments from your computer system. We do not waive > attorney-client or work product privilege by the transmission of this > message. > > > > > > ----------------------------------------- > The information contained in this message is intended only for the > personal and confidential use of the recipient(s) named above. If > the reader of this message is not the intended recipient or an > agent responsible for delivering it to the intended recipient, you > are hereby notified that you have received this document in error > and that any review, dissemination, distribution, or copying of > this message is strictly prohibited. If you have received this > communication in error, please notify us immediately, and delete > the original message. > > Steve Roder University at Buffalo ([EMAIL PROTECTED] | (716)645-3564)
