To add a single device explicitly, use the following syntax: # echo "scsi add-single-device " > /proc/scsi/scsiįor e.g. # echo 1 > /sys/block/ sdc/device/delete How Do I Add a Single Device Called /dev/sdc? # echo 1 > /sys/block/ devName/device/delete In addition to re-scanning the entire bus, a specific device can be added or existing device deleted using the following command: # echo "-" | tee /sys/class/scsi_host/host*/scan How Do I Delete a Single Device Called /dev/sdc? To scan all run the following combination of echo command and tee command: Jul 18 16:29:39 localhost kernel: sd 0:0:2:0: Attached scsi generic sg2 type 0 Jul 18 16:29:39 localhost kernel: sd 0:0:2:0: Attached scsi disk sdc Jul 18 16:29:39 localhost kernel: sdc: unknown partition table Jul 18 16:29:39 localhost kernel: sdc: assuming drive cache: write through Jul 18 16:29:39 localhost kernel: sdc: cache data unavailable Jul 18 16:29:39 localhost kernel: sdc: Write Protect is off Jul 18 16:29:39 localhost kernel: target0:0:2: Ending Domain Validation Jul 18 16:29:39 localhost kernel: target0:0:2: Domain Validation skipping write tests Jul 18 16:29:39 localhost kernel: target0:0:2: Beginning Domain Validation
Jul 18 16:29:39 localhost kernel: Vendor: VMware, Model: VMware Virtual S Rev: 1.0 Jul 18 16:29:39 localhost kernel: sd 0:0:1:0: Attached scsi generic sg1 type 0 Jul 18 16:29:39 localhost kernel: sd 0:0:1:0: Attached scsi disk sdb Jul 18 16:29:39 localhost kernel: sdb: unknown partition table Jul 18 16:29:39 localhost kernel: sdb: assuming drive cache: write through Jul 18 16:29:39 localhost kernel: sdb: cache data unavailable Jul 18 16:29:39 localhost kernel: sdb: Write Protect is off Jul 18 16:29:39 localhost kernel: target0:0:1: Ending Domain Validation Jul 18 16:29:39 localhost kernel: target0:0:1: Domain Validation skipping write tests
Jul 18 16:29:39 localhost kernel: target0:0:1: Beginning Domain Validation Jul 18 16:29:39 localhost kernel: Type: Direct-Access ANSI SCSI revision: 02 Sample Outputs: Jul 18 16:29:39 localhost kernel: Vendor: VMware, Model: VMware Virtual S Rev: 1.0 # echo "-" > /sys/class/scsi_host/ host0/scan
Now type the following to send a rescan request: You can find scsi_host value using the following ls command: Replace host# with actual value such as host0. Fig.01:Linux Vmware Rescan New Scsi Disk Without Reboot
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