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: 03Host: scsi0 Channel: 00 Id: 01 Lun: 00  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 02 Lun: 00  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 03 Lun: 00  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 06 Lun: 00  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16  Type:   Processor                        ANSI SCSI revision: 02e6ELinux联盟
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: 03Host: scsi0 Channel: 00 Id: 01 Lun: 00  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 03 Lun: 00  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 06 Lun: 00  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16  Type:   Processor                        ANSI SCSI revision: 02e6ELinux联盟
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: 03Host: scsi0 Channel: 00 Id: 01 Lun: 00  Vendor: SEAGATE  Model: ST318406LC       Rev: 8A03  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 02 Lun: 00  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 03 Lun: 00  Vendor: IBM      Model: DDYS-T09170M     Rev: S93E  Type:   Direct-Access                    ANSI SCSI revision: 03Host: scsi0 Channel: 00 Id: 06 Lun: 00  Vendor: DELL     Model: 1x4 U2W SCSI BP  Rev: 1.16  Type:   Processor                        ANSI SCSI revision: 02e6ELinux联盟