We had no trouble with AIT-2 using 128K block sizes. I can not speak from
direct experience on using 192K block sizes for AIT-2 tapes but I know you
can set them even higher than that so you should not have any problems.
Yes you still will have problems mounting the tape that have old block sizes
on them. That will be fine though as NetWorker will still read off of them.
If you need to you can shutdown networker and set the block size back to
your old one and do your restores and then change it back.
Have fun!
Chad Smykay, RHCE, LCNA
Systems Storage Administrator
Rackspace Managed Hosting (TM)
210-892-4025 ext 1603
Cell: 210-273-2344
-----Original Message-----
From: Matt Temple [mailto:mht AT research.dfci.harvard DOT edu]
Sent: Monday, May 17, 2004 4:11 PM
To: Legato NetWorker discussion; Chad Smykay
Subject: Re: [Networker] Tape positioning by record is disabled.
Chad Smykay wrote:
> Actually you can leave it to 0 for both
>
> # SONY AIT-2
> manufacturer=SONY model = "SDX-500C" { can-bsr scsi2logical
> drive-buffering timeout=800 long-timeout=14400
> mode1 blocksize=0 density=0x00 # Block Size and Density }
>
> # SONY AIT-3
> manufacturer=SONY model = "SDX-700C" { can-bsr scsi2logical
> drive-buffering timeout=800 long-timeout=14400
> mode1 blocksize=0 density=0x00 # as close as possible to st.conf
> entry
>
> I'm not sure if you have any AIT-2 drives but it sounds like you only
> have 2
> AIT-3 drives. So just leave it at 0 and set the block size in NetWorker
to:
>
> NSR_DEV_BLOCK_SIZE_8MM_AIT_2=128 (or to whatever you want)
> NSR_DEV_BLOCK_SIZE_8MM_AIT_3=128 (or to whatever you want) export
> NSR_DEV_BLOCK_SIZE_8MM_AIT_2 NSR_DEV_BLOCK_SIZE_8MM_AIT_3
>
> Then you should be good from here on out. Also check on that firmware
> too as the AIT-3 drives had problems even mounting AIT-2 tapes.
>
> Hope some of this info helps.
Thanks -- I upgraded the firmware. Now if I make thsi change, I assume
I'll have trouble monuting the old tapes built with a diffetrnet
blocksize. Also, do you know if an AIT-2 tape drive can use
192K blocks?
Also, does "handler default" mean "whatever NSR_DEV_BLOCK..." is set to?
Matt Temple
>
>
> Chad Smykay, RHCE, LCNA
> Systems Storage Administrator
> Rackspace Managed Hosting (TM)
>
>
> -----Original Message-----
> From: Matt Temple [mailto:mht AT research.dfci.harvard DOT edu]
> Sent: Monday, May 17, 2004 3:20 PM
> To: Chad Smykay
> Cc: 'Legato NetWorker discussion'
> Subject: Re: [Networker] Tape positioning by record is disabled.
>
> Please see additional response below vvvvvvvvvvvvvv
>
>
> Chad Smykay wrote:
>
>>Matt,
>>
>>We used to use AIT-2 and AIT-3 tapes and tape drives in combination
>>with in our library and used to have issue. What we ended up doing
>>was set the block size in both the ST driver and Networker to the
>>exact same block size for each type of drives and tapes. Unless you
>>are trying to use types of tapes or drives for a specific purpose i.e.
>>faster restores then I would recommend setting them to both the same size.
>>
>>On a side note we did find that there was any issue with AIT-3 drive
>>firmware not able to properly be backwards compatible with AIT-2 tapes.
>>
>>We are currently running AIT-3 firmware: 0201
>>
>>This is one of the most recent firmware's for AIT-3 drives.
>>
>>Regards,
>>
>>
>>
>>
>>Chad Smykay, RHCE, LCNA
>>Systems Storage Administrator
>>Rackspace Managed Hosting (TM)
>>
>>-----Original Message-----
>>From: Legato NetWorker discussion
>>[mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] On Behalf Of Matt Temple
>>Sent: Monday, May 17, 2004 2:14 PM
>>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>>Subject: [Networker] Tape positioning by record is disabled.
>>
>>All,
>>
>> After a frustrating process in which I had a tape drive that
>>would label tapes that my other drives couldn't read, I chose to force the
>>blocksize on my AIT-3 tapes to 192K. (I believed that was the handler
>>default for AIT-3, is this wrong?)
>>
>>I tell Networker to use these block sizes in the startup:
>>
>>NSR_DEV_BLOCK_SIZE_8MM_AIT_3=192
>>export NSR_DEV_BLOCK_SIZE_8MM_AIT_3
>>NSR_DEV_BLOCK_SIZE_8MM_AIT_2=64
>>export NSR_DEV_BLOCK_SIZE_8MM_AIT_2
>>
>>This result in the following messages:
>>
>>May 14 15:18:48 tapes logger: NetWorker media: (notice) setting (8mm
>>AIT-2) block size to (64 KB)
>>May 14 15:18:49 tapes logger: NetWorker media: (notice) setting (8mm
>>AIT-3) block size to (192 KB)
>>
>>
>>I run stinit and get kernel messages similar to:
>>
>>st2: Block limits 2 - 16777215 bytes.
>>
>>Since two of my drives will be getting only AIT-3 tapes, I set their
>>block size to 192K through nwadmin.
>>
>>Checking with scanner, it looks like the block size is correctly set
>>on the tapes I've produced.
>>
>>======================================================
>>When the tape is full and it's time to verify the media, I get the
>>following:
>>
>>media notice: Volume "lnx57.0308" on device "/dev/nst1": Cannot decode
>>block. Verify the device configuration. Tape positioning by record is
>>disabled.
>>Mon 12:08:38 media info: verification of volume "lnx57.0308", volid
>>162008460 succeeded.
>>
>>=======================================================
>>
>>I thought the "cannot decode block" message only came when you didn't
>>run stinit and the tape simply used default 512-byte blocks.
>>
>>Can someone tell me if I'm getting a real error? Should I be labeling
>>my tapes or defining my drives differently? What does "handler
>>default" realy mean -- I think the documentation for it is thin.
>>
>>
>>
>
> Matt Temple
>
>
>
> Chad,
>
> Right now our stinit.def file looks like this:
>
>
> # SONY AIT-3
> manufacturer="SONY" model = "SDX-700C" { can-bsr scsi2logical
> drive-buffering timeout=800 long-timeout=14400
> mode1 blocksize=0 density=0x00 }
>
> Are you suggesting I should change it to:
>
> # SONY AIT-3
> manufacturer="SONY" model = "SDX-700C" { can-bsr scsi2logical
> drive-buffering timeout=800 long-timeout=14400
> mode1 blocksize=196608 density=0x32 }
>
>
> Matt Temple
>
>
> --
> =============================================================
> Matthew Temple Tel: 617/632-2597
> Director, Research Computing Fax: 617/582-7820
> Dana-Farber Cancer Institute mht AT research.dfci.harvard DOT edu
> 44 Binney Street, LG300/300 http://research.dfci.harvard.edu
> Boston, MA 02115 Choice is the Choice!
>
> --
> Note: To sign off this list, send a "signoff networker" command via
> email to listserv AT listmail.temple DOT edu or visit the list's Web site at
> http://listmail.temple.edu/archives/networker.html where you can also
> view and post messages to the list.
> =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
--
=============================================================
Matthew Temple Tel: 617/632-2597
Director, Research Computing Fax: 617/582-7820
Dana-Farber Cancer Institute mht AT research.dfci.harvard DOT edu
44 Binney Street, LG300/300 http://research.dfci.harvard.edu
Boston, MA 02115 Choice is the Choice!
--
Note: To sign off this list, send a "signoff networker" command via email
to listserv AT listmail.temple DOT edu or visit the list's Web site at
http://listmail.temple.edu/archives/networker.html where you can
also view and post messages to the list.
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
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