hot plugging eSATA

[Lennart Sorensen]

On Sat, Jun 12, 2010 at 10:37:06PM -0400, D. Hugh Redelmeier wrote:
> | From: Lennart Sorensen <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org>
> | Date: Mon, 5 Apr 2010 12:35:16 -0400
> 
> | On Sat, Apr 03, 2010 at 12:14:33PM -0400, D. Hugh Redelmeier wrote:
> 
> | > - all SATA controllers support hot plug
> | 
> | No they don't.
> 
> This page might be useful:
> 
>  <https://ata.wiki.kernel.org/index.php/SATA_hardware_features>

A good list.  And it clearly shows that many controllers do not do
hotplug.  The intel ones for example only do it in AHCI mode, which for
many of them meant only the 'R' version supported it.

> I'm not clear on what is the correct protocol for unplugging.
>  <http://www.phoronix.com/forums/showthread.php?t=21985>
> has a variety of suggestions.  hdparm -Y is amongst them (surely after an 
> unmount).
> 
> While we're on the topic of external disk drives, I'll throw in another 
> link:
>  <http://sourceforge.net/apps/trac/smartmontools/wiki/Supported_USB-Devices>.
> This lists USB devices with smartmontools support.  Many others don't work 
> with smartmontools

-- 
Len Sorensen
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