Re: Hotswap IDE

[Johannes Stezenbach]

Mike Black wrote:
> I use a removable IDE chassis to allow me to mirror my primary drive for offsite storage.
> I'd like to hotswap the IDE but can't seem to get the drive to allow DMA access after restarting it.
> A reboot is necessary for DMA access.
> I'm using idectl from hdparm-5.4 which generates the following hdparm commands:
> /sbin/hdparm -U 1 /dev/hda
> /sbin/hdparm -R 0x170 0 0 /dev/hda

I haven't tried myself, but Alan Cox did:

Linux 2.4.22-rc2-ac3
 o       Finish off the core IDE hotplug support         (me)
         | If your hardware supports it you can now
         | hdparm -b0 /dev/hdc  change drive hdparm -b1 /dev/hdc

Maybe that works better than -U/-R ?

Johannes
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