Use of READ POSITION/LOCATE

Dave Peterson dap at cisco.com
Mon Jul 22 20:07:09 PDT 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* "Dave Peterson" <dap at cisco.com>
*
Howdy Paul,

Interesting feedback from a system vendor. I'm certainly interested in the
reasoning.

Thanks...dap

> -----Original Message-----
> From: Paul.A.Suhler at seagate.com [mailto:Paul.A.Suhler at seagate.com]
> Sent: Monday, July 22, 2002 9:31 PM
> To: snia-backup at snia.org; t10 at t10.org
> Subject: RE: Use of READ POSITION/LOCATE
>
>
>
> I ran this past a system vendor, who said:
>
>    We are firmly in the camp strongly in support of the transport layer
>    error recovery protocols.
>
> He recommends asking this of the host vendors.  He's passed his
> comments to
> his T10 rep, who may choose to respond directly with more detail on their
> reasons.
>
> Cheers,
>
> Paul
>
> +-+-+-+-+-+-+-+-+
>
> Paul Suhler
> Seagate Removable Storage Solutions
> 1650 Sunflower Avenue
> Costa Mesa, CA 92626
>
>
>
>
>
>                     "Dave
>
>                     Peterson"            To:     "MCCARTHY,JOHN
> \(HP-Greeley,ex1\)" <jmccarthy at hp.com>,
>                     <dap at cisco.co        <snia-backup at snia.org>
>
>                     m>                   cc:     "'Mallikarjun'"
> <cbm at rose.hp.com>
>                                          Subject:     RE: Use of
> READ POSITION/LOCATE
>                     07/22/02
>
>                     01:31 PM
>
>
>
>
>
>
>
>
>
> Howdy All,
>
> I have received responses from an excellent snapshot of the vendors
> actually
> involved in the tape realm (backup apps, drive vendors). To
> summarize, READ
> POSITION and LOCATE are in wide use today. Not a single vendor indicated
> that they do not support/use READ POSITION, while only one vendor
> indicated
> that they do not use LOCATE (and this seems to be a non-mainstream case).
> Additionally, devices that do not support these commands (i.e., legacy
> devices) are a rare breed and of the parallel SCSI ilk.
>
> This further acknowledges my belief that the usefulness for
> transport level
> error detection and recovery (specifically for tape devices) has run its
> course...dap
>
>

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