SATA hotplug from the user side ?

[Soeren Sonnenburg <kernel@nn7.de>]

Dear all,

I'd like to try out SATA hotplugging using a SIL3114. Though I was
harvesting the web, I could not find any useful information how this is
done in practice.

Well I realized that I can still use scsiadd to print and remove
devices, e.g.:

# scsiadd -p

Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: ST3400832AS      Rev: 3.01
  Type:   Direct-Access                    ANSI SCSI revision: 05
Host: scsi3 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: ST3400620AS      Rev: 3.AA
  Type:   Direct-Access                    ANSI SCSI revision: 05

# scsiadd -r 3 0 0 0

Is this all one has to do for hotplugging ? I am asking as I find this
in dmesg when I do so (2.6.19.* kernel):

Synchronizing SCSI cache for disk sdb: 
ata4.00: disabled
ata4: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0x2 frozen
ata4: hard resetting port
ata4: SATA link down (SStatus 0 SControl 310)
ata4: EH complete
ata4: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0x2 frozen
ata4: hard resetting port
ata4: port is slow to respond, please be patient (Status 0xff)
ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
ata4.00: ATA-7, max UDMA/133, 781422768 sectors: LBA48 NCQ (depth 0/32)
ata4.00: configured for UDMA/100
ata4: EH complete
scsi 3:0:0:0: rejecting I/O to dead device
scsi 3:0:0:0: rejecting I/O to dead device


Soeren
-- 
For the one fact about the future of which we can be certain is that it
will be utterly fantastic. -- Arthur C. Clarke, 1962