linux 下scsi磁盘热插拔

ljh1405

First thing you have to do is make sure nothing is using the device. Check if you have software raid that it's been faild. Hopefully you didn't have a directory hard mounted on the system.
then you must find some information on the drive that was pulled....
cat /proc/scsi/scsi
Get the HOST CHAN ID and LUN #'s for the device. Then...
echo "scsi-remove-single-device HOST CHAN DEV LUN' > /proc/scsi/scsi
That removes the device from the system.
Hot Add the drive
echo "scsi-add-single-device HOST CHAN DEV LUN' > /proc/scsi/scsi
Adds it back in and spins it up.
-Nate
EXAMPLE: ASSUME IT WAS SDC REMOVEDB:
# cat /proc/scsi/scsi
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DMVS09M          Rev: 0220
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 03 Lun: 00
  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16
  Type:   Processor                        ANSI SCSI revision: 02
So that would be
host 0 Channel 0 id 3 lun 0
echo 'scsi-remove-single-device 0 0 2 0' > /proc/scsi/scsi
cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DMVS09M          Rev: 0220
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 03 Lun: 00
  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16
  Type:   Processor                        ANSI SCSI revision: 02
Device is now gone
echo 'scsi-add-single-device 0 0 3 0' > /proc/scsi/scsi
And the device is back.
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DMVS09M          Rev: 0220
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 03 Lun: 00
  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16
  Type:   Processor                        ANSI SCSI revision: 02


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