from the df -k command, I see sda, sdb, sdc disks. They have some partitions (for example, sda has sda1, sda3). I want to detach sdb and sdc temporarily for OS upgrade. How exactly can I tell which disk is which? (actually I know sdc is the disk I recently attached, but how can I tell sda,sdb,sdc, from the SCSI connection? I remember SCSI connectors didn't have any order..)
ckim@stph45:/boot/grub] cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: Samsung SSD 850 Rev: EXM0 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: ST2000DM001-1CH1 Rev: CC27 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: HL-DT-ST Model: BD-RE BH16NS40 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05 Host: scsi4 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: WDC WD100EFAX-68 Rev: 83.H Type: Direct-Access ANSI SCSI revision: 05 ckim@stph45:/boot/grub] df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda3 226026064 103433752 111103800 49% / tmpfs 32958068 0 32958068 0% /dev/shm /dev/sda1 201454560 4911408 186303152 3% /tools /dev/sdc1 4806455048 387782752 4174511784 9% /home1 /dev/sdc2 4806466304 18391096 4543914032 1% /home2 /dev/sdb1 1922727280 853724060 971327620 47% /home 
lsblk -o +VENDOR,MODELwhich will show you the manufacturer and model number reported by each physical device. You can also see the serial numbers withSERIAL.