Release Notes

Linux setup and configuration
19 Dell EMC PowerVault ME4 Series and Linux | 3924-BP-L
On the Linux host, run the lsscsi command to show the volume LUN IDs. The highlighted digits in red
correspond to the LUN IDs of the volumes.
[root@r730xd-1 me4_fs]# lsscsi -is|grep ME4
[18:0:4:0] disk DellEMC ME4 G275 /dev/sdl
3600c0ff0003c589f1e4b6b5b01000000 214GB
[18:0:4:1] disk DellEMC ME4 G275 /dev/sdk
3600c0ff0003c589f97596b5b01000000 161GB
[18:0:4:2] disk DellEMC ME4 G275 /dev/sdm
3600c0ff0003c589f98596b5b01000000 161GB
[18:0:5:0] disk DellEMC ME4 G275 /dev/sdd
3600c0ff0003c589f1e4b6b5b01000000 214GB
[18:0:5:1] disk DellEMC ME4 G275 /dev/sdn
3600c0ff0003c589f97596b5b01000000 161GB
[18:0:5:2] disk DellEMC ME4 G275 /dev/sdo
3600c0ff0003c589f98596b5b01000000 161GB
[19:0:4:0] disk DellEMC ME4 G275 /dev/sdi
3600c0ff0003c589f1e4b6b5b01000000 214GB
[19:0:4:1] disk DellEMC ME4 G275 /dev/sdp
3600c0ff0003c589f97596b5b01000000 161GB
[19:0:4:2] disk DellEMC ME4 G275 /dev/sdq
3600c0ff0003c589f98596b5b01000000 161GB
[19:0:5:0] disk DellEMC ME4 G275 /dev/sdj
3600c0ff0003c589f1e4b6b5b01000000 214GB
[19:0:5:1] disk DellEMC ME4 G275 /dev/sdr
3600c0ff0003c589f97596b5b01000000 161GB
[19:0:5:2] disk DellEMC ME4 G275 /dev/sds
3600c0ff0003c589f98596b5b01000000 161GB
3.1.3.2 Identify volumes by SCSI IDs
Alternatively, using SCSI IDs to identify the volumes is more precise because SCSI IDs are unique on the
storage system and on the host, and they will not change. This method reduces the chance of confusion if the
LUN IDs are changed unintentionally. It is common to set up persistent device mapping to fixate the device
file names, file ownership, and permission. This can be achieved by creating udev rules that search for
specific SCSI IDs, rename device files, and make ownership and permission changes.
To view SCSI IDs, one option is to run the lsscsi command. See the prior example in section 3.1.3.1 which
shows the SCSI IDs highlighted in blue.