Add and remove scsi devices in linux

Add and remove the scsi device-linux Enterprise Application-Linux server application. For more information, see the following section. I have made a lot of scsi devices before. I should have accumulated some experience, but I still forget a lot of details.

How many scsi hard disks are tested today? How to test, of course, hot swapping. This time, the hard disk is continuously hot-swapped on dell1750 to test whether there is a bad disk.

First of all, we need to know that 1750 and 1750 and above are different from each other. These old hard disks are inserted into the machine's empty slot. This time, 3rd slots are used, so the command, echo "scsi add-single-device 0 0 2 0">/proc/scsi, the start id is 0. Remember to use the root permission. The above parameter meaning, please refer to original: linux add scsi hard disk notes: http://hi.baidu.com/zheng918/blo... 06342262d09fe7.html

# Cat/proc/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: MAXTOR Model: ATLAS10K4_36SCA Rev: DFM0
Type: Direct-Access ansi scsi revision: 03
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: COMPAQ Model: bd04255a24 Rev: HPB6
Type: Direct-Access ansi scsi revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: PE/PV Model: 1x3 scsi bp Rev: 1.1
Type: Processor ansi scsi revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: QUANTUM Model: ATLAS10K3_73_SCA Rev: 120G
Type: Direct-Access ansi scsi revision: 03

You can see the hard disk with id 2 added, and then use fdisk-l to see the hard disk. If you see the 73G hard drive added, you will know that this disk is not broken. And how to partition and format it.

Fdisk-l
Disk/dev/sdc: 73.4 GB, 73407820800 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065*512 = 8225280 bytes

Device Boot Start End Blocks Id System
/Dev/sdc1 1 8924 71681998 + 83 Linux

If the test is successful, the device will be removed. The root permission is also required to delete the information that has just been echo to proc, echo "scsi remove-single-device 0 0 0 2 0">/proc/scsi, remember that the ID number is the same as the previous one, and then unplug the hard disk.

This is a very simple action. It is very useful for cainiao to skip it.

From: http://hi.baidu.com/zheng918