Re: Redundant Tape SAN
As always this list has wealth of knowledge. If we build it I may have real questions. Thanks everyone. Andy Huebner -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Rick Saylor Sent: Wednesday, February 26, 2014 12:15 PM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Redundant Tape SAN Andy, Dual-ported drives such as the 3592 can be connected to both fabrics. Single ported drives such as lto4 can be connected only to one fabric but you can alternate which fabrics the drives are connected to. So, half of the single ported drives are on one fabric and half are on the other. The AIX Atape driver will handle the multiple paths by enabling the alternate path option. To enable the alternate path support issue chdev -l rmtx/smcx -a alt_pathing=yes for each rmt and smc device. By the way, there is a limit of 16 paths per device. Below is a listing of the tape devices on my TSM server. You'll notice the drives appear multiple times, once as a primary(PRI) device and several more times as alternate(ALT) devices. You only need to define the primary devices to TSM. Atape will determine which path the I/O actually takes. I hope this helps. lsdev -Cc tape rmt0 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt1 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt2 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt3 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt4 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt5 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt6 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt7 Available 01-00-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt8 Available 01-00-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt9 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt10 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt11 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt12 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt13 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt14 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt15 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt16 Available 01-01-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt17 Available 01-01-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt18 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt19 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt20 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt21 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt22 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt23 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt24 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt25 Available 0B-00-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt26 Available 0B-00-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt27 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt28 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt29 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt30 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt31 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt32 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt33 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt34 Available 0B-01-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt35 Available 0B-01-02-ALT IBM 3580 Ultrium Tape Drive (FCP) smc0 Available 01-00-02-PRI IBM 3584 Library Medium Changer (FCP) smc1 Available 01-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc2 Available 01-00-02-PRI IBM 3584 Library Medium Changer (FCP) smc3 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc4 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc5 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc6 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc7 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc8 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc9 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc10 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc11 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) At 10:27 AM 2/26/2014, you wrote: >The concept, 2 fabrics, 1 server to 1 drive. >In practice, many servers and many drives and many libraries. > >Andy Huebner > > >-Original Message- >From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf >Of Rick Saylor >Sent: Wednesday, February 26, 2014 9:52 AM >To: ADSM-L@VM.MARIST.EDU >Subject: Re: [ADSM-L] Redundant Tape SAN > >Andy, > >What do you mean by "redundant tape san"? Multiple tape libraries at >the same or remote location? Tape drives with more than one fiber port? > >Thanks, >Rick > >At 08:19 AM 2/26/2014, you wrote: > >Is anyone using redundant tape SAN with TSM on AIX? > > > >Andy Huebner
Re: Redundant Tape SAN
Our tape environment has it's own SAN and it is not redundant. That is, we have a single fabric that all servers and tape drives attach to. Our tape drives are single path attached to the fabric. The drives have dual FC ports, but we only use one. Each server has dual HBA cards which connect to the fabric. We use Atape with multi-pathing. Rick -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Huebner, Andy Sent: Wednesday, February 26, 2014 9:19 AM To: ADSM-L@VM.MARIST.EDU Subject: Redundant Tape SAN Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner - 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.
Re: Redundant Tape SAN
Andy, Dual-ported drives such as the 3592 can be connected to both fabrics. Single ported drives such as lto4 can be connected only to one fabric but you can alternate which fabrics the drives are connected to. So, half of the single ported drives are on one fabric and half are on the other. The AIX Atape driver will handle the multiple paths by enabling the alternate path option. To enable the alternate path support issue chdev -l rmtx/smcx -a alt_pathing=yes for each rmt and smc device. By the way, there is a limit of 16 paths per device. Below is a listing of the tape devices on my TSM server. You'll notice the drives appear multiple times, once as a primary(PRI) device and several more times as alternate(ALT) devices. You only need to define the primary devices to TSM. Atape will determine which path the I/O actually takes. I hope this helps. lsdev -Cc tape rmt0 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt1 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt2 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt3 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt4 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt5 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt6 Available 01-00-02-PRI IBM 3592 Tape Drive (FCP) rmt7 Available 01-00-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt8 Available 01-00-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt9 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt10 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt11 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt12 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt13 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt14 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt15 Available 01-01-02-ALT IBM 3592 Tape Drive (FCP) rmt16 Available 01-01-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt17 Available 01-01-02-PRI IBM 3580 Ultrium Tape Drive (FCP) rmt18 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt19 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt20 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt21 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt22 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt23 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt24 Available 0B-00-02-ALT IBM 3592 Tape Drive (FCP) rmt25 Available 0B-00-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt26 Available 0B-00-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt27 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt28 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt29 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt30 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt31 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt32 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt33 Available 0B-01-02-ALT IBM 3592 Tape Drive (FCP) rmt34 Available 0B-01-02-ALT IBM 3580 Ultrium Tape Drive (FCP) rmt35 Available 0B-01-02-ALT IBM 3580 Ultrium Tape Drive (FCP) smc0 Available 01-00-02-PRI IBM 3584 Library Medium Changer (FCP) smc1 Available 01-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc2 Available 01-00-02-PRI IBM 3584 Library Medium Changer (FCP) smc3 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc4 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc5 Available 01-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc6 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc7 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc8 Available 0B-00-02-ALT IBM 3584 Library Medium Changer (FCP) smc9 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc10 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) smc11 Available 0B-01-02-ALT IBM 3584 Library Medium Changer (FCP) At 10:27 AM 2/26/2014, you wrote: The concept, 2 fabrics, 1 server to 1 drive. In practice, many servers and many drives and many libraries. Andy Huebner -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Rick Saylor Sent: Wednesday, February 26, 2014 9:52 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Redundant Tape SAN Andy, What do you mean by "redundant tape san"? Multiple tape libraries at the same or remote location? Tape drives with more than one fiber port? Thanks, Rick At 08:19 AM 2/26/2014, you wrote: >Is anyone using redundant tape SAN with TSM on AIX? > >Andy Huebner
Re: Redundant Tape SAN
The concept, 2 fabrics, 1 server to 1 drive. In practice, many servers and many drives and many libraries. Andy Huebner -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Rick Saylor Sent: Wednesday, February 26, 2014 9:52 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Redundant Tape SAN Andy, What do you mean by "redundant tape san"? Multiple tape libraries at the same or remote location? Tape drives with more than one fiber port? Thanks, Rick At 08:19 AM 2/26/2014, you wrote: >Is anyone using redundant tape SAN with TSM on AIX? > >Andy Huebner
Re: Redundant Tape SAN
I personally think it's worth the effort, not so much for the fail-over but for the fact the Atape driver will do some HBA load balancing for you to maximize performance across less utilized HBA ports. We do have a few ProtecTier's in the mix and also a Windows 2008R2 based LAN Free server, the LF server actually utilizes some of this redundancy as well and the IBM Tape driver load balancing as well. For the VTL based devices what we typically do is rename the rmt entries in AIX based on their serial number since they've typically been just different drives behind the same front end WWPN's. We're running 60 physical LTO5's and 128 emulated LTO3 devices from the PT for comparisons sake. With some scripts work wise it isn't too much more effort. - Original Message - Is it worth the work? Are there any VTLs involved? I may be doing 4 TSM servers to 18x 3952's, 8x LTO6 shared drives and 120x LTO1's for each server non-shared in multiple DataDomains. I also have LANFree clients that do not support redundant fabrics. Thank you, Andy Huebner -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Mike De Gasperis Sent: Wednesday, February 26, 2014 8:44 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Redundant Tape SAN We utilize a redundant tape SAN at our main data centers with multiple host site HBA ports. Using the Atape control and data path fail-over options we have twelve device entries for each physical tape device. Works really well and this is in an AIX/LPAR/VIO environment, we've virtualized the HBA ports and are using NPIV. We have some scripts created that rename each rmt entry via chdev to utilize the last four digits of the WWPN and the AIX fiber channel adapter to make things easier to line up as well when defining drives in TSM. - Original Message - Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner
Re: Redundant Tape SAN
Andy, What do you mean by "redundant tape san"? Multiple tape libraries at the same or remote location? Tape drives with more than one fiber port? Thanks, Rick At 08:19 AM 2/26/2014, you wrote: Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner
Re: Redundant Tape SAN
Is it worth the work? Are there any VTLs involved? I may be doing 4 TSM servers to 18x 3952's, 8x LTO6 shared drives and 120x LTO1's for each server non-shared in multiple DataDomains. I also have LANFree clients that do not support redundant fabrics. Thank you, Andy Huebner -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Mike De Gasperis Sent: Wednesday, February 26, 2014 8:44 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Redundant Tape SAN We utilize a redundant tape SAN at our main data centers with multiple host site HBA ports. Using the Atape control and data path fail-over options we have twelve device entries for each physical tape device. Works really well and this is in an AIX/LPAR/VIO environment, we've virtualized the HBA ports and are using NPIV. We have some scripts created that rename each rmt entry via chdev to utilize the last four digits of the WWPN and the AIX fiber channel adapter to make things easier to line up as well when defining drives in TSM. - Original Message - Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner
Re: Redundant Tape SAN
We utilize a redundant tape SAN at our main data centers with multiple host site HBA ports. Using the Atape control and data path fail-over options we have twelve device entries for each physical tape device. Works really well and this is in an AIX/LPAR/VIO environment, we've virtualized the HBA ports and are using NPIV. We have some scripts created that rename each rmt entry via chdev to utilize the last four digits of the WWPN and the AIX fiber channel adapter to make things easier to line up as well when defining drives in TSM. - Original Message - Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner
Redundant Tape SAN
Is anyone using redundant tape SAN with TSM on AIX? Andy Huebner
