un

dmesg | grep "sd"

peux déjà donner quelques réponses mais si le but est de le faire de maniere automatique/scripté c'est mort

par contre :

#ls -R /sys/bus/scsi/devices/[0-9]* | grep sd
sda
/sys/bus/scsi/devices/0:0:0:0/block/sda:
sda1
sda10
sda2
sda3
sda5
sda6
sda7
sda8
sda9
/sys/bus/scsi/devices/0:0:0:0/block/sda/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/queue:
/sys/bus/scsi/devices/0:0:0:0/block/sda/queue/iosched:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda1:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda1/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda1/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda1/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda10:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda10/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda10/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda10/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda2:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda2/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda2/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda2/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda3:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda3/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda3/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda3/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda5:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda5/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda5/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda5/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda6:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda6/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda6/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda6/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda7:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda7/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda7/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda7/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda8:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda8/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda8/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda8/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda9:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda9/holders:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda9/power:
/sys/bus/scsi/devices/0:0:0:0/block/sda/sda9/trace:
/sys/bus/scsi/devices/0:0:0:0/block/sda/slaves:
/sys/bus/scsi/devices/0:0:0:0/block/sda/trace:
sdb
/sys/bus/scsi/devices/9:0:0:0/block/sdb:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/holders:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/power:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/queue:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/queue/iosched:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/slaves:
/sys/bus/scsi/devices/9:0:0:0/block/sdb/trace:
sdc
/sys/bus/scsi/devices/9:0:0:1/block/sdc:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/holders:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/power:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/queue:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/queue/iosched:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/slaves:
/sys/bus/scsi/devices/9:0:0:1/block/sdc/trace:
sdd
/sys/bus/scsi/devices/9:0:0:2/block/sdd:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/holders:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/power:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/queue:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/queue/iosched:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/slaves:
/sys/bus/scsi/devices/9:0:0:2/block/sdd/trace:
sde
/sys/bus/scsi/devices/9:0:0:3/block/sde:
/sys/bus/scsi/devices/9:0:0:3/block/sde/holders:
/sys/bus/scsi/devices/9:0:0:3/block/sde/power:
/sys/bus/scsi/devices/9:0:0:3/block/sde/queue:
/sys/bus/scsi/devices/9:0:0:3/block/sde/queue/iosched:
/sys/bus/scsi/devices/9:0:0:3/block/sde/slaves:
/sys/bus/scsi/devices/9:0:0:3/block/sde/trace:

commence a donner une réponse interessante ^^

Je ne connais pas la signification exact des A:B:C:D (ie: /sys/bus/scsi/devices/A:B:C:D/block/ ) mais ça doit etre facile a trouver

A doit etre le lun, D l'ID attribué au disque, B et C peut etre lié a la chaine SCSI, comme je n'ai que tu SATA et des lecteurs USB sur cette machine...