library sharing without SAN
hello , For experimental purpose can we use autochanger for sharing between two TSM servers ( solaris and windows ) without SAN ,if yes then what is the procedure to do it. if any one know about this please help me. TSM administrator
Re: library sharing without SAN
Does a configuration such as that need special support by the library? What happens if both systems send commands to the robot? Also, what about the drives? Most SCSI libraries I know of have the drives cabled directly on their own SCSI channels. Definitely the two I have... an ATL P3000 and an HP 20/700. This sounds very interesting, and I'm wondering if I can use it while we migrate from the P3000 to the 20/700. Currently they are attached to two different servers - the P3000 to an F50 and the 20/700 to an HP L2000. As far as I know, the method of recording data on DLT tapes differs on those two OSes, and they cannot read each others' tapes. Robin Sharpe Berlex Labs Bill Smoldt smoldt@STORS OL.COM To:[EMAIL PROTECTED] cc:(bcc: Robin Sharpe/WA/USR/SHG) 01/09/02 Subject: 08:54 AM Re: library sharing without SAN Please respond to ADSM: Dist Stor Manager You can connect a library on a SCSI bus between the two systems and share the library the same way as you would in a SAN. I've never tried it between Solaris and Windows, but it should work fine as long as the controllers don't interfere with each other electrically (they will typically be different brands). The controllers must have different SCSI target addresses - I usually use the default of 7 on one and 6 on the other. If you just want to get some experience with shared libraries within TSM, the simplest method is to create a second TSM server instance on the same system. Then you can define a shared library between the two. I use this method for training classes. Bill Smoldt STORServer, Inc. -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Chandrasekhar CR Sent: Wednesday, January 09, 2002 1:54 AM To: [EMAIL PROTECTED] Subject: library sharing without SAN hello , For experimental purpose can we use autochanger for sharing between two TSM servers ( solaris and windows ) without SAN ,if yes then what is the procedure to do it. if any one know about this please help me. TSM administrator
Re: library sharing without SAN
No special support with all the SCSI adapters that I've dealt with - mostly Adaptec and QLogic. The hardware has been capable of this for years and I've used this on many OpenVMS clusters and NT clusters. The initiators don't talk to each other, and the devices have to be capable of doing a SCSI disconnect. All arbitration and locking for the robot and drives takes place in the TSM Server. Might ease your library movement, but I've never tried crossing the data tapes between platforms. It's certainly unsupported so you'd want to rewrite the tapes even if it worked. Is that what you're thinking? Bill Smoldt STORServer, Inc. -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Robin Sharpe Sent: Wednesday, January 09, 2002 5:49 AM To: [EMAIL PROTECTED] Subject: Re: library sharing without SAN Does a configuration such as that need special support by the library? What happens if both systems send commands to the robot? Also, what about the drives? Most SCSI libraries I know of have the drives cabled directly on their own SCSI channels. Definitely the two I have... an ATL P3000 and an HP 20/700. This sounds very interesting, and I'm wondering if I can use it while we migrate from the P3000 to the 20/700. Currently they are attached to two different servers - the P3000 to an F50 and the 20/700 to an HP L2000. As far as I know, the method of recording data on DLT tapes differs on those two OSes, and they cannot read each others' tapes. Robin Sharpe Berlex Labs Bill Smoldt smoldt@STORS OL.COM To:[EMAIL PROTECTED] cc:(bcc: Robin Sharpe/WA/USR/SHG) 01/09/02 Subject: 08:54 AM Re: library sharing without SAN Please respond to ADSM: Dist Stor Manager You can connect a library on a SCSI bus between the two systems and share the library the same way as you would in a SAN. I've never tried it between Solaris and Windows, but it should work fine as long as the controllers don't interfere with each other electrically (they will typically be different brands). The controllers must have different SCSI target addresses - I usually use the default of 7 on one and 6 on the other. If you just want to get some experience with shared libraries within TSM, the simplest method is to create a second TSM server instance on the same system. Then you can define a shared library between the two. I use this method for training classes. Bill Smoldt STORServer, Inc. -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Chandrasekhar CR Sent: Wednesday, January 09, 2002 1:54 AM To: [EMAIL PROTECTED] Subject: library sharing without SAN hello , For experimental purpose can we use autochanger for sharing between two TSM servers ( solaris and windows ) without SAN ,if yes then what is the procedure to do it. if any one know about this please help me. TSM administrator
Re: library sharing without SAN
You can connect a library on a SCSI bus between the two systems and share the library the same way as you would in a SAN. I've never tried it between Solaris and Windows, but it should work fine as long as the controllers don't interfere with each other electrically (they will typically be different brands). The controllers must have different SCSI target addresses - I usually use the default of 7 on one and 6 on the other. If you just want to get some experience with shared libraries within TSM, the simplest method is to create a second TSM server instance on the same system. Then you can define a shared library between the two. I use this method for training classes. Bill Smoldt STORServer, Inc. -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Chandrasekhar CR Sent: Wednesday, January 09, 2002 1:54 AM To: [EMAIL PROTECTED] Subject: library sharing without SAN hello , For experimental purpose can we use autochanger for sharing between two TSM servers ( solaris and windows ) without SAN ,if yes then what is the procedure to do it. if any one know about this please help me. TSM administrator
Re: library sharing without SAN
Now that I think about it, I'm not sure what advantage we would gain, if any. Our goal is to eventually move the P3000 and f50 to another location anyway. Wait a minute, I just thought of a benefit... the reason we got the new library was because we overflowed the old one. It's still a problem juggling tapes just to do reclaims on the old system. Anyway, I was just curious how it would all work... I didn't think you could define SCSI libraries to TSM as SHARED (or don't you have to?). How do you physically cable it? Just replace the SCSI terminator(s) with a cable(s) to the other system? I guess I would want to something like this (please excuse rudimentory non-graphics): HP L2000 (TSM2) -scsi- HP 20/700 -scsi IBM F50 (TSM1) -scsi- ATL P3000 Then I would want to check some tapes into the 20/700 to allow TSM1 to do reclaims. 20/700 has 553 available slots; P3000 has none. Robin Sharpe Berlex Labs Bill Smoldt smoldt@STORS OL.COM To:[EMAIL PROTECTED] cc:(bcc: Robin Sharpe/WA/USR/SHG) 01/09/02 Subject: 10:15 AM Re: library sharing without SAN Please respond to ADSM: Dist Stor Manager No special support with all the SCSI adapters that I've dealt with - mostly Adaptec and QLogic. The hardware has been capable of this for years and I've used this on many OpenVMS clusters and NT clusters. The initiators don't talk to each other, and the devices have to be capable of doing a SCSI disconnect. All arbitration and locking for the robot and drives takes place in the TSM Server. Might ease your library movement, but I've never tried crossing the data tapes between platforms. It's certainly unsupported so you'd want to rewrite the tapes even if it worked. Is that what you're thinking? Bill Smoldt STORServer, Inc.
