Hot-swap SATA and atacontrol
justin at redwiredesign.com
Tue Aug 2 09:23:23 GMT 2005
OK, so how can I be sure that the controller DOES support hotswap SATA?
I've tested pulling and replacing the drive several times while the system's
on, umounting and remounting it to no ill affect.
atacontrol's capability list below shows me lots of info, but I don't know
how that relates to hotswap.
one point is that the case comes with a hotswap backplane and I presume that
the Supermicro board that's running the SATA should support hot-swap - it's
running an Intel 6300ESB controller, and afaik that supports hot-swap.
ATA channel 1, Master, device ad2:
Protocol Serial ATA v1.0
device model ST3160827AS
serial number 4MT0J7AA
firmware revision 3.42
lba supported 268435455 sectors
lba48 supported 312581808 sectors
overlap not supported
Feature Support Enable Value Vendor
write cache yes yes
read ahead yes yes
SATA NCQ yes - 31/0x1F
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no 65278/0xFEFE
automatic acoustic management no no 0/0x00 254/0xFE
From: Søren Schmidt [mailto:sos at FreeBSD.org]
Sent: 02 August 2005 10:11
To: Justin Finkelstein
Cc: 'Colin King'; freebsd-current at FreeBSD.org
Subject: Re: Hot-swap SATA and atacontrol
On 02/08/2005, at 9:42, Justin Finkelstein wrote:
> OK; so, what you're saying is that it'll be ok to pull the drive if
> unmounted it?
> In that case, is the atacontrol step unneccesary? My thinking is
> that it
> might be, but it's just another step to ensure nothing goes wrong.
If the SATA controller supports hotswap ATA will notice when you yank
the drive and detach it properly from the system (ATA wise, if
mounted you get into trouble). Also it will autodiscover any SATA
driver added, again only on supporting chipsets (and those I know how
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