You cannot have more than one filer attached to the same SCSI chain.
What you can do is have one drive attached to one filer and another drive attached to another filer, as long as you can break the SCSI bus at the library side. Most libraries with more than 2 drives can do this.
You will see multiple in/out connections. That is what it is for.
--tmac
====================== Tim McCarthy Professional Services/Systems Engineer NetApp Federal Systems, Inc. 410-551-3970 (o) 443-363-0208 (f) tmac@netapp.com tmac-pager@netapp.com ======================
-----Original Message----- From: Alan Sparks [mailto:asparks@doublesparks.net] Sent: Friday, April 15, 2005 11:00 AM To: Lance R Bailey Cc: Toasters List Subject: Re: Changing Netapp SCSI target ID
Lance R Bailey said:
i have a qualstar library with the drives attached to a linux host, F720, F87 and F85 filers.
the scsi number is set on the library. each drive slot has a different number. when the filer sees it (verify with sysconfig -t) the scsi number assigned to the drive on the scsi bus will be the one on library.
OK. So you're saying that it will not cause a conflict if I daisy chain the filers together onto the same wire to the library drives. OK, that or 3-way NDMP are two possible options then. Thanks. -Alan
=========== Alan Sparks, UNIX/Linux Systems Administrator asparks@doublesparks.net
is he trying to daisy chain tape drives or daisy chain filers?
-- email: lance_bailey@pmc-sierra.com box: Lance R. Bailey, sr unix Admin vox: +1 604 415 6646 PMC-Sierra, Inc fax: +1 604 415 6151 105-8555 Baxter Place http://www.lydia.org/~zaphod Burnaby BC, V5A 4V7 When _I_ started programming, we didn't even have _disks_. We had to use GRAD STUDENTS for SWAP. -- Martin Golding
On Fri, Apr 15, 2005 at 08:51:02AM -0700, McCarthy, Tim wrote:
You cannot have more than one filer attached to the same SCSI chain.
What you can do is have one drive attached to one filer and another drive attached to another filer, as long as you can break the SCSI bus at the library side. Most libraries with more than 2 drives can do this.
You will see multiple in/out connections. That is what it is for.
--tmac
====================== Tim McCarthy Professional Services/Systems Engineer NetApp Federal Systems, Inc. 410-551-3970 (o) 443-363-0208 (f) tmac@netapp.com tmac-pager@netapp.com ======================
-----Original Message----- From: Alan Sparks [mailto:asparks@doublesparks.net] Sent: Friday, April 15, 2005 11:00 AM To: Lance R Bailey Cc: Toasters List Subject: Re: Changing Netapp SCSI target ID
Lance R Bailey said:
i have a qualstar library with the drives attached to a linux host, F720, F87 and F85 filers.
the scsi number is set on the library. each drive slot has a different number. when the filer sees it (verify with sysconfig -t) the scsi number assigned to the drive on the scsi bus will be the one on library.
OK. So you're saying that it will not cause a conflict if I daisy chain the filers together onto the same wire to the library drives. OK, that or 3-way NDMP are two possible options then. Thanks. -Alan
=========== Alan Sparks, UNIX/Linux Systems Administrator asparks@doublesparks.net
Both. Un-optimum situation. Three filers, two drives. Plus the NetBackup server itself. Just not enough tape connections to dedicate to direct connections, and not really wanting to dedicate drives anyway.
The "no more than one filer per chain" situation is what I originally figured. -Alan
Lance R Bailey said:
is he trying to daisy chain tape drives or daisy chain filers?
-- email: lance_bailey@pmc-sierra.com box: Lance R. Bailey, sr unix Admin vox: +1 604 415 6646 PMC-Sierra, Inc fax: +1 604 415 6151 105-8555 Baxter Place http://www.lydia.org/~zaphod Burnaby BC, V5A 4V7 When _I_ started programming, we didn't even have _disks_. We had to use GRAD STUDENTS for SWAP. -- Martin Golding
On Fri, Apr 15, 2005 at 08:51:02AM -0700, McCarthy, Tim wrote:
You cannot have more than one filer attached to the same SCSI chain.
What you can do is have one drive attached to one filer and another drive attached to another filer, as long as you can break the SCSI bus at the library side. Most libraries with more than 2 drives can do this.
You will see multiple in/out connections. That is what it is for.
--tmac
====================== Tim McCarthy Professional Services/Systems Engineer NetApp Federal Systems, Inc. 410-551-3970 (o) 443-363-0208 (f) tmac@netapp.com tmac-pager@netapp.com ======================
-----Original Message----- From: Alan Sparks [mailto:asparks@doublesparks.net] Sent: Friday, April 15, 2005 11:00 AM To: Lance R Bailey Cc: Toasters List Subject: Re: Changing Netapp SCSI target ID
Lance R Bailey said:
i have a qualstar library with the drives attached to a linux host, F720, F87 and F85 filers.
the scsi number is set on the library. each drive slot has a different number. when the filer sees it (verify with sysconfig -t) the scsi number assigned to the drive on the scsi bus will be the one on library.
OK. So you're saying that it will not cause a conflict if I daisy chain the filers together onto the same wire to the library drives. OK, that or 3-way NDMP are two possible options then. Thanks. -Alan
=========== Alan Sparks, UNIX/Linux Systems Administrator asparks@doublesparks.net
=========== Alan Sparks, UNIX/Linux Systems Administrator asparks@doublesparks.net
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Alan Sparks -
Lance R Bailey -
McCarthy, Tim