Re: AW: [ADSM-L] Mixing drive types in logical library 3584
Thanks Andreas, Is I said, my experience is very limited. Can you tell me how you configure the differents devclass please ? Reagards, Pierre -Message d'origine- De : ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] De la part de Andreas Kaiser Envoyé : mardi 5 juin 2007 09:54 À : ADSM-L@VM.MARIST.EDU Objet : [ADSM-L] AW: [ADSM-L] Mixing drive types in logical library 3584 We have 4 LTO1 and 2 LTO3 using different device classes in our 3484, FORMAT=ULTRIUM*, unpartitioned. Never had any problems moving data from LTO1 to LTO3 or vice versa, using the "move data" command. TSM does not seem to use LTO3 drives to read LTO1 though. One NAS device class was specified with FORMAT=DRIVE (following the docs) but I have never seen any confusion over this matter, it always used LTO3 for those tapes. +++ SÜDKURIER Jahresarchiv 2006 auf DVD mit über 300 Ausgaben +++ Alle +++ Texte und Bilder mit bequemer Suchfunktion: www.suedkurier.de/shop +++
Re: Mixing drive types in logical library 3584
Hi,
Heres a select statement I use that helps see scratch levels when using
multiple libraries and media types.
select libraries.Library_name, libvolumes.mediatype, count(*) as "Scratch"
from libraries, libvolumes where
libraries.library_name=libvolumes.library_name and
libvolumes.status='Scratch' group by libraries.Library_name,
libvolumes.mediatype
Matt.
http://tsmwiki.com/tsmwiki/SelectStatements/MixedMediaScratch
Internet
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To
ADSM-L
Sent by: ADSM-L@VM.MARIST.EDU
cc
02/06/2007 07:32
Subject
Re: [ADSM-L] Mixing drive
types in logical library 3584
Please respond to
ADSM-L@VM.MARIST.EDU
Hi all,
I recently tested a TS3310 library - using 8 char tape labels.
It had only LTO3 drives but two devclasses, one for lto2 and one for lto3.
When loaded with a mix of LTO2 and 3 tapes it chose the correct scratch
tape
for the job, based on the devclass being used.
I don't know and couldn't test whether this works the other way. One thing
to be careful of is that you can run out of scratch tapes of one sort or
the
other, the operation fails, but TSM OR and the usual home-grown selects
will
show that there are scratches in the library - so you need to be a bit
smarter with your scratch management.
Regards
Steve
Steven Harris,
AIX and TSM Admin
Brisbane Australia
Soon moving to Sydney - any job offers gratefully received.
-Original Message-
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of
Prather, Wanda
Sent: Saturday, 2 June 2007 5:03 AM
To: ADSM-L@VM.MARIST.EDU
Subject: Re: [ADSM-L] Mixing drive types in logical library 3584
(snip)..our information is that TSM is smart enough to mount LTO media only
in drives appropriate to the operation (so LTO2 media will only mount in an
LTO4 drive if it's being read, not written;
LTO4 media will never be mounted in an LTO2 drive; etc.) So if you were to
add LTO3 media to that library down the road, TSM would access it only
through the LTO3 drives (and if all the LTO3 drives were being used with
LTO2 media while an LTO2 drive sits idle, too
bad.)
Can you tell me where you got that information?
Seems to me that coflicts with the statement in IBM technote 1155662.
"However, mixing LTO-1 and LTO-3 is not recommended because LTO-3 drive can
read but cannot write to LTO-1 media".
If you have LTO2 carts checked in to the library, and LTO4 drives, what is
to keep TSM from trying to mount one of the LTO2 carts in the LTO4 drive
for
WRITE?
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AW: [ADSM-L] Mixing drive types in logical library 3584
We have 4 LTO1 and 2 LTO3 using different device classes in our 3484, FORMAT=ULTRIUM*, unpartitioned. Never had any problems moving data from LTO1 to LTO3 or vice versa, using the "move data" command. TSM does not seem to use LTO3 drives to read LTO1 though. One NAS device class was specified with FORMAT=DRIVE (following the docs) but I have never seen any confusion over this matter, it always used LTO3 for those tapes. +++ SÜDKURIER Jahresarchiv 2006 auf DVD mit über 300 Ausgaben +++ +++ Alle Texte und Bilder mit bequemer Suchfunktion: www.suedkurier.de/shop +++
Re: Mixing drive types in logical library 3584
I have a 3583 with 3 LTO1 drives and 1 LTO3. I have 2 devclass's defined with FORMAT=ULTRIUMC and FORMAT=ULTRIUM3C and stgpools defined to use the specific type. I notice that if I had specified FORMAT=DRIVES, then it was possible that when asking for a scratch that I would get an LTO1 when I really wanted an LTO3 for that stgpool. The documentation does state that using mixed drive types you should not specify FORMAT=DRIVE. The main problem I ran in to was that I was unable to issue any commands that would copy/move the data from LTO1 to LTO3. The process would sit in a waiting for mountpoint and never finish. I opened a PMR and it went all the way up to the developers. The PMR was closed as a documentation "fix" that said to FULLY support mixed drive types in a library you must logically partition the library to separate the drives in different partitions. They said that the algorithm for device allocation would need a significant overhaul so they were changing the documentation. This was probably about a year ago I posted this to ADSM-L. Try searching the archives for my posts. Bill Boyer "Experience is a comb nature gives us after we go bald." - ?? -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of CAYE PIERRE Sent: Sunday, June 03, 2007 6:32 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: Mixing drive types in logical library 3584 Well I forgot that, if the library is able to manage different cartridge type, everything is different. My experience is very limited and about STK Libraries (with ACSLS of course), and 358x libraries (3583/3584), with and without partitioning. It is also different when mixing LTO drives with other technologies. -Message d'origine- De : ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] De la part de Brian Matthias Envoyé : dimanche 3 juin 2007 03:52 À : ADSM-L@VM.MARIST.EDU Objet : Re: [ADSM-L] Mixing drive types in logical library 3584 You may have found your answer; however, there is a TSM Technote on libraries using mixed media. The Technote reference number is 1155662 Regards, Brian Matthias -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Chris McKay Sent: Wednesday, May 30, 2007 12:39 To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Mixing drive types in logical library 3584 Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Any input would be appreciated. Regards, Chris __ This message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you for your cooperation.
Re: Mixing drive types in logical library 3584
Well I forgot that, if the library is able to manage different cartridge type, everything is different. My experience is very limited and about STK Libraries (with ACSLS of course), and 358x libraries (3583/3584), with and without partitioning. It is also different when mixing LTO drives with other technologies. -Message d'origine- De : ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] De la part de Brian Matthias Envoyé : dimanche 3 juin 2007 03:52 À : ADSM-L@VM.MARIST.EDU Objet : Re: [ADSM-L] Mixing drive types in logical library 3584 You may have found your answer; however, there is a TSM Technote on libraries using mixed media. The Technote reference number is 1155662 Regards, Brian Matthias -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Chris McKay Sent: Wednesday, May 30, 2007 12:39 To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Mixing drive types in logical library 3584 Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Any input would be appreciated. Regards, Chris __ This message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you for your cooperation.
Re: Mixing drive types in logical library 3584
In fact the problem is that, with tsm, there are no different scratch pools, with different cartridges type in each. TSM use all the scratch cartridges equally, whatever type of cartridge it can be. Thus, if you mixt LTO drives with one different generation between them (ie LTO1/LTO2 LTO2/LTO3), you must use cartridges corresponding to the lowest generation, to be write compatible with both drives type. If you mixt LTO drives with a gap of TWO generation between them, if you have scratch cartridges of the lowest type, they will generate hardware errors when TSM will try to write them with the highest type drives and, on contrary, if you have scratch of the highest type, they will generate hardware error when writen with the lowest type drives. This will happend if you have mixed drives on the same library. If the library is partitioned, it is like if you had two library, each one with a specific drive type and, of course, the relative cartridges, so there can be no problems. It is the same if you use library sharing manager software like ACSLS (and/or LS), which can manage different drives and different scratch pools. Consequence are that, if you wish to upgrade your drives, be careful about the gap between drives generation. And think strongly about mixing different drive types. An other point, if upgrading all the drives on shot, if the gap one generation max (ie LTO1/LTO3), you can still read cartdridges of the old generation, but be carefull to make them read only to avoid hardware problems, even for read access. I mean, when a cartrdige is accessed for reading, if it is not in read only access, the drive ensure that it can write on it resulting with hardware errors, but if the cartrdige is in read only access, the drive read it peacefully, without any problems. Thanks, Pierre -Message d'origine- De : ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] De la part de Brian Matthias Envoyé : dimanche 3 juin 2007 03:52 À : ADSM-L@VM.MARIST.EDU Objet : Re: [ADSM-L] Mixing drive types in logical library 3584 You may have found your answer; however, there is a TSM Technote on libraries using mixed media. The Technote reference number is 1155662 Regards, Brian Matthias -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Chris McKay Sent: Wednesday, May 30, 2007 12:39 To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Mixing drive types in logical library 3584 Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Any input would be appreciated. Regards, Chris __ This message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you for your cooperation.
Re: Mixing drive types in logical library 3584
You may have found your answer; however, there is a TSM Technote on libraries using mixed media. The Technote reference number is 1155662 Regards, Brian Matthias -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Chris McKay Sent: Wednesday, May 30, 2007 12:39 To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Mixing drive types in logical library 3584 Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Any input would be appreciated. Regards, Chris __ This message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you for your cooperation.
Re: Mixing drive types in logical library 3584
Hi all, I recently tested a TS3310 library - using 8 char tape labels. It had only LTO3 drives but two devclasses, one for lto2 and one for lto3. When loaded with a mix of LTO2 and 3 tapes it chose the correct scratch tape for the job, based on the devclass being used. I don't know and couldn't test whether this works the other way. One thing to be careful of is that you can run out of scratch tapes of one sort or the other, the operation fails, but TSM OR and the usual home-grown selects will show that there are scratches in the library - so you need to be a bit smarter with your scratch management. Regards Steve Steven Harris, AIX and TSM Admin Brisbane Australia Soon moving to Sydney - any job offers gratefully received. -Original Message- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Prather, Wanda Sent: Saturday, 2 June 2007 5:03 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Mixing drive types in logical library 3584 (snip)..our information is that TSM is smart enough to mount LTO media only in drives appropriate to the operation (so LTO2 media will only mount in an LTO4 drive if it's being read, not written; LTO4 media will never be mounted in an LTO2 drive; etc.) So if you were to add LTO3 media to that library down the road, TSM would access it only through the LTO3 drives (and if all the LTO3 drives were being used with LTO2 media while an LTO2 drive sits idle, too bad.) Can you tell me where you got that information? Seems to me that coflicts with the statement in IBM technote 1155662. "However, mixing LTO-1 and LTO-3 is not recommended because LTO-3 drive can read but cannot write to LTO-1 media". If you have LTO2 carts checked in to the library, and LTO4 drives, what is to keep TSM from trying to mount one of the LTO2 carts in the LTO4 drive for WRITE? -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.5/826 - Release Date: 31/05/2007 4:51 PM
Re: Mixing drive types in logical library 3584
(snip)..our information is that TSM is smart enough to mount LTO media only in drives appropriate to the operation (so LTO2 media will only mount in an LTO4 drive if it's being read, not written; LTO4 media will never be mounted in an LTO2 drive; etc.) So if you were to add LTO3 media to that library down the road, TSM would access it only through the LTO3 drives (and if all the LTO3 drives were being used with LTO2 media while an LTO2 drive sits idle, too bad.) Can you tell me where you got that information? Seems to me that coflicts with the statement in IBM technote 1155662. "However, mixing LTO-1 and LTO-3 is not recommended because LTO-3 drive can read but cannot write to LTO-1 media". If you have LTO2 carts checked in to the library, and LTO4 drives, what is to keep TSM from trying to mount one of the LTO2 carts in the LTO4 drive for WRITE?
Re: Mixing drive types in logical library 3584
Hi all I think that you will encounter few problems. Compatibility is not managed as well with TSM. Unfortunatly, TSM didn't recognize the difference between cartridges. When mixing two generation with a gap (ie LTO1 and LTO3 or LTO2 and LTO4), it is recomended to update cartridges of the oldest generation in read only acces. On the other hand, you wil replace all scratch with cartridges of the latest generation. Thanks, Pierre -Message d'origine- De : ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] De la part de Stuart Lamble Envoyé : jeudi 31 mai 2007 02:03 À : ADSM-L@VM.MARIST.EDU Objet : Re: [ADSM-L] Mixing drive types in logical library 3584 On 31/05/2007, at 3:38 AM, Chris McKay wrote: > Hi all, > > I have been told by IBM that fibre LTO2 drives are no longer > available. We wish to expand the number of drives in our 3584 library > from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose > a problem by adding an additional 3 LTO3 drives to that logical > library? Is it possible under Windows?? I realize I will need to > continue to use LTO2 media, as the existing LTO2 drives would not be > compatable with LTO3 media. Our TSM server is running on Windows 2003. Compatibility with LTO media is straightforward: one generation back for write; two generations back for read. So an LTO3 drive is a perfectly reasonable way to extend your LTO2 capabilities, as well as giving you the ability to migrate to LTO3 down the road. At Monash, we're running one silo on LTO3, one on LTO2. We're looking at upgrading the LTO2 silo to LTO4, and have checked the compatibility; our information is that TSM is smart enough to mount LTO media only in drives appropriate to the operation (so LTO2 media will only mount in an LTO4 drive if it's being read, not written; LTO4 media will never be mounted in an LTO2 drive; etc.) So if you were to add LTO3 media to that library down the road, TSM would access it only through the LTO3 drives (and if all the LTO3 drives were being used with LTO2 media while an LTO2 drive sits idle, too bad.) You may want to double check this, though, if it's a concern for you down the road. I can't speak for how far this advice extends into Windows - we're running TSM on Solaris - but it's a starting point. My expectation would be that there would be no problem as long as the LTO3 drive is compatible with the drivers on the Windows system.
Re: Mixing drive types in logical library 3584
On 31/05/2007, at 3:38 AM, Chris McKay wrote: Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Compatibility with LTO media is straightforward: one generation back for write; two generations back for read. So an LTO3 drive is a perfectly reasonable way to extend your LTO2 capabilities, as well as giving you the ability to migrate to LTO3 down the road. At Monash, we're running one silo on LTO3, one on LTO2. We're looking at upgrading the LTO2 silo to LTO4, and have checked the compatibility; our information is that TSM is smart enough to mount LTO media only in drives appropriate to the operation (so LTO2 media will only mount in an LTO4 drive if it's being read, not written; LTO4 media will never be mounted in an LTO2 drive; etc.) So if you were to add LTO3 media to that library down the road, TSM would access it only through the LTO3 drives (and if all the LTO3 drives were being used with LTO2 media while an LTO2 drive sits idle, too bad.) You may want to double check this, though, if it's a concern for you down the road. I can't speak for how far this advice extends into Windows - we're running TSM on Solaris - but it's a starting point. My expectation would be that there would be no problem as long as the LTO3 drive is compatible with the drivers on the Windows system.
Mixing drive types in logical library 3584
Hi all, I have been told by IBM that fibre LTO2 drives are no longer available. We wish to expand the number of drives in our 3584 library from 2 to 5. The current 2 drives are fibre LTO2 drives, would it pose a problem by adding an additional 3 LTO3 drives to that logical library? Is it possible under Windows?? I realize I will need to continue to use LTO2 media, as the existing LTO2 drives would not be compatable with LTO3 media. Our TSM server is running on Windows 2003. Any input would be appreciated. Regards, Chris __ This message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you for your cooperation.
