Michael Miller wrote:
As long as the RAID card supports HOT swapping drives you are fine.
SCSI,SATA and SAS all support hot swapping or hot plugging drives.
What connectors on the motherboard are you referring too? Do you want
to pull PCI cards while the system is up and running? I've yet to see
this done successfully on HP-UX hardware and Solaris Hardware as well.
I don't know of any PCI cards that you can swap HOT under linux.
Sorry, I wasn't clear. I'm talking about hot-swapping the SATA drives
connected to the on motherboard connectors. Not the ones on the RAID
card. Basically I have drives connected to the RAID card. These I'm
fairly sure I can hot-swap if I place them in a cage. I also want to do
backups to a e.SATA drive. This drive comes with a bracket that connects
a e.SATA external connector to an internal SATA connector. I'm planning
on plugging this into the SATA port on the motherboard. I just need to
understand what I need to do to make the drive 'visible' to the OS once
I've plugged it in. Will the OS 'see' it automagically or do I have to
'scan' for it. If I do have to initiate something, then what?
Documentation on this seems vague at best.
When you pull the drive make sure it is unmounted. Then remove the
drive so that it is disconnected from the back plane of the drive
cage. Wait 3 or 4 minutes the drive should have stopped spinning
after 2 minutes and then remove the drive.
Is this to prevent physical damage to the drive (spinning head + motion
= bad)? I'm just asking because I have a nasty habit of unplugging a USB
hard drive and just running with it (after unmounting it of course)
Miller
On 12/28/06, Garl Grigsby <[EMAIL PROTECTED]> wrote:
Michael Miller wrote:
> You should not have a issue with hot swapping as long as the hardware
> controller supports it.
Ok, now for the $10k question: How do you know? I know the raid card
supports it (I had to email several people to find out), but what about
the motherboard connectors?
> If you do have a issue with the drives not
> showing up in a dmesg. Then all you need too do is run a script that
> scans the SCSI bus. Other than that you should not have any issues
> hot swapping drives. I would caution you on ripping out drives that
> have not finished spinning down. Not a good idea.
Ok, how to spin the drive down before you remove them?
Garl
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