Sata PCI that supports Hot Swap Enclosures question

[louis]

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 ?

 

[Guest]

Archived from groups: comp.sys.ibm.pc.hardware.storage (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)

 

[Guest]

Archived from groups: comp.sys.ibm.pc.hardware.storage (More info?)

"J. Clarke" <jclarke@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.