Jeremy Chadwick wrote:
On Mon, Sep 29, 2008 at 05:25:32PM +0200, Miroslav Lachman wrote:
It was about year ago with Asus and Sun Fire X2100. I don't have Asus
servers now (all returned as reclamation). Now I am running one X2100
and about ten X2100 M2. I have one spare X2100 M2, so if somebody have
exact order of commands used to "hot-swap" the disk, I can test it in
few days.
I believe the correct order of operation is to do a "detach" on the
channel before physically removing the disk, insert the new disk, then
do "attach" on the same channel. "list" should be done afterwards to
ensure the new disk shows up.
If you want me to verify for certain, I have a test box built in the
other room which has a SATA hot-swap backplane on it.
I've also seen cases where the "attach" works, but upon doing "list",
the old disk ID/string is still shown. In this case I had to do a
"detach", remove the disk, insert the new disk, "reinit", then an
"attach" for things to work.
Finally, I've also seen the kernel panic or hard-lock after running
"reinit", but this may have had something to do with Intel MatrixRAID.
Today I was replacing disk in one Sun Fire X2100 M2 so I tried
hot-swapping. It was as you said: atacontrol detach ata3, replace the
HDD, atacontrol attach ata3 and new disk is in the system. I tried it 3
times to be sure that it was not coincidence - no panic was produced ;o)
So in this case, hot-swapping on Sun Fire X2100 M2 with FreeBSD 7.0 i386
works.
Miroslav Lachman
# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <Hitachi HDP725050GLA360/GM4OA52A> Serial ATA II
Slave: no device present
ATA channel 3:
Master: ad6 <Hitachi HDP725050GLA360/GM4OA52A> Serial ATA II
Slave: no device present
# atacontrol detach ata3
subdisk6: detached
ad6: detached
GEOM_MIRROR: Device gm0: provider ad6 disconnected
# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <Hitachi HDP725050GLA360/GM4OA52A> Serial ATA II
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
## [old disk was physically removed]
## [new disk was physically inserted]
# atacontrol attach ata3
ata3: [ITHREAD]
ad6: 953869MB <SAMSUNG HD103UJ 1AA01113> at ata3-master SATA300
Master: ad6 <SAMSUBF HD103UJ/1AA01113> Serial ATA II
Slave: no device present
# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <Hitachi HDP725050GLA360/GM4OA52A> Serial ATA II
Slave: no device present
ATA channel 3:
Master: ad6 <SAMSUNG HD103UJ/1AA01113> Serial ATA II
Slave: no device present
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