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andylouie

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Since: Jan 25, 2005
Posts: 3



(Msg. 1) Posted: Tue Jan 25, 2005 8:35 pm
Post subject: Sata PCI that supports Hot Swap Enclosures question
Archived from groups: comp>sys>ibm>pc>hardware>storage (more info?)
Does the PCI Card itself needs to be hot swap capable or the Enclosures
alone ? Please advise. Saw a few from Granite but not sure if it works
well. Does it supports Mutitasking like SCSI ?

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J. Clarke

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Since: Jan 09, 2004
Posts: 935



(Msg. 2) Posted: Wed Jan 26, 2005 10:30 am
Post subject: Re: Sata PCI that supports Hot Swap Enclosures question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Louis wrote:

 > Does the PCI Card itself needs to be hot swap capable or the Enclosures
 > alone ?


The card has to support it but most do--hot-swap is part of the SATA
spec--the trouble is that some of the chip manufacturers didn't fully
implement the spec.

 > Please advise. Saw a few from Granite but not sure if it works
 > well. Does it supports Mutitasking like SCSI ?

SATA allows one drive and one host adapter per bus. In that situation
nothing special has to be done to support multitasking--any such support
would be upstream of the SATA hardware.

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)<!-- ~MESSAGE_AFTER~ -->

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Folkert Rienstra

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Since: Nov 10, 2003
Posts: 1906



(Msg. 3) Posted: Thu Jan 27, 2005 12:53 am
Post subject: Re: Sata PCI that supports Hot Swap Enclosures question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
"J. Clarke" <jclarke DeleteThis @nospam.invalid> wrote in message news:ct8eqe350g@news2.newsguy.com
 > Louis wrote:
 >
  > > Does the PCI Card itself needs to be hot swap capable or the Enclosures
  > > alone ?
 >
 >
 > The card has to support it but most do--hot-swap is part of the SATA
 > spec--the trouble is that some of the chip manufacturers didn't fully
 > implement the spec.
 >
  > > Please advise. Saw a few from Granite but not sure if it works
  > > well. Does it supports Mutitasking like SCSI ?
 >
 > SATA allows one drive and one host adapter per bus.

Nonsense.
It's point to point but several drives can be connected through a concentrator.

 > In that situation nothing special has to be done to support multi-
 > tasking--any such support would be upstream of the SATA hardware.

If the device (not drive) is a concentrator then the question of IO
serialization or parallelization (device/drive multitasking) comes up.<!-- ~MESSAGE_AFTER~ -->
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