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more detail:
OS:centos 6.5
device. config:
Drive: 253 CHANNEL: 22 TARGET: 0 LUN: 3
Library ID: 250 Slot: 3
Vendor identification: HP
Product identification: Ultrium 5-SCSI
Product revision level: N11G
Unit serial number: 8100213
NAA: 250:11:22:33:ab:22:0:3
Compression: factor 1 enabled 1
Compression type: lzo
Backoff: 400
Drive: 254 CHANNEL: 22 TARGET: 0 LUN: 4
Library ID: 250 Slot: 4
Vendor identification: HP
Product identification: Ultrium 5-SCSI
Product revision level: N11G
Unit serial number: 8100214
NAA: 250:11:22:33:ab:22:0:4
Compression: factor 1 enabled 1
Compression type: lzo
Backoff: 400
Drive: 255 CHANNEL: 22 TARGET: 0 LUN: 5
Library ID: 250 Slot: 5
Vendor identification: HP
Product identification: Ultrium 5-SCSI
Product revision level: N11G
Unit serial number: 8100215
NAA: 250:11:22:33:ab:22:0:5
Compression: factor 1 enabled 1
Compression type: lzo
Backoff: 400
Drive: 256 CHANNEL: 22 TARGET: 0 LUN: 6
Library ID: 250 Slot: 6
Vendor identification: HP
Product identification: Ultrium 5-SCSI
Product revision level: N11G
Unit serial number: 8100216
NAA: 250:11:22:33:ab:22:0:6
Compression: factor 1 enabled 1
Compression type: lzo
Backoff: 400
Drive: 257 CHANNEL: 22 TARGET: 0 LUN: 7
Library ID: 250 Slot: 7
Vendor identification: HP
Product identification: Ultrium 5-SCSI
Product revision level: N11G
Unit serial number: 8100217
NAA: 250:11:22:33:ab:22:0:7
Compression: factor 1 enabled 1
I can see /dev/mhvtl256 in the /dev
crw-r-----. 1 vtl vtl 248, 250 12月 17 13:31 mhvtl250
crw-r-----. 1 vtl vtl 248, 251 12月 17 13:31 mhvtl251
crw-r-----. 1 vtl vtl 248, 252 12月 17 13:31 mhvtl252
crw-r-----. 1 vtl vtl 248, 253 12月 17 13:31 mhvtl253
crw-r-----. 1 vtl vtl 248, 254 12月 17 13:31 mhvtl254
crw-r-----. 1 vtl vtl 248, 256 12月 17 13:31 mhvtl256
crw-r-----. 1 vtl vtl 248, 257 12月 17 13:31 mhvtl257
crw-r-----. 1 vtl vtl 248, 258 12月 17 13:31 mhvtl258
crw-r-----. 1 vtl vtl 248, 260 12月 17 13:31 mhvtl260
crw-r-----. 1 vtl vtl 248, 261 12月 17 13:31 mhvtl261
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Locked
