Dec 042012
 

Recently, I rearranged the bottom shelf of my rack and rotated the DEC library 90°. Then I placed a new [to me] Overland DLT MinilibraryXpress (model LXM8115).

The racked tape libraries The cabling

I plugged the cable from my server into the Overland unit and daisy-chained that to the DEC library. The grey cable which leads up and out of the photo leads to the server. The cable which leads slightly up and to the left and then loops back down is the chaining cable. It connects one tape library to the other. I can do this because I know the two tape libraries use the same type of SCSI bus. Be cautious when connecting like this. You could cause damage.

After powering up both libraries, I ran this command:

camcontrol rescan 12

From history, I knew it was bus 12 I wanted to rescan. That produced the following messages in /var/log/messages:

Dec  3 23:25:15 kraken kernel: (probe4:ahc0:0:4:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 
Dec  3 23:25:15 kraken kernel: (probe4:ahc0:0:4:0): CAM status: SCSI Status Error
Dec  3 23:25:15 kraken kernel: (probe4:ahc0:0:4:0): SCSI status: Check Condition
Dec  3 23:25:15 kraken kernel: (probe4:ahc0:0:4:0): SCSI sense: UNIT ATTENTION asc:29,4 (Device internal reset)
Dec  3 23:25:16 kraken kernel: (probe6:ahc0:0:6:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 
Dec  3 23:25:16 kraken kernel: (probe6:ahc0:0:6:0): CAM status: SCSI Status Error
Dec  3 23:25:16 kraken kernel: (probe6:ahc0:0:6:0): SCSI status: Check Condition
Dec  3 23:25:16 kraken kernel: (probe6:ahc0:0:6:0): SCSI sense: UNIT ATTENTION asc:29,0 (Power on, reset, or bus device reset occurred)
Dec  3 23:26:04 kraken kernel: (probe4:ahc0:0:4:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 
Dec  3 23:26:04 kraken kernel: (probe4:ahc0:0:4:0): CAM status: SCSI Status Error
Dec  3 23:26:04 kraken kernel: (probe4:ahc0:0:4:0): SCSI status: Check Condition
Dec  3 23:26:04 kraken kernel: (probe4:ahc0:0:4:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
Dec  3 23:26:04 kraken kernel: sa1 at ahc0 bus 0 scbus12 target 4 lun 0
Dec  3 23:26:04 kraken kernel: sa1: <QUANTUM DLT8000 0250> Removable Sequential Access SCSI-2 device 
Dec  3 23:26:04 kraken kernel: sa1: 10.000MB/s transfers (10.000MHz, offset 15)
Dec  3 23:26:15 kraken kernel: ch1 at ahc0 bus 0 scbus12 target 6 lun 0
Dec  3 23:26:15 kraken kernel: ch1: <OVERLAND LXB 0524>; Removable Changer SCSI-2 device 
Dec  3 23:26:15 kraken kernel: ch1: 10.000MB/s transfers (10.000MHz, offset 15)
Dec  3 23:26:15 kraken kernel: ch1: 15 slots, 1 drive, 1 picker, 0 portals

Ignore the first 11 lines. The rest is the important stuff. Line 14 is the new tape drive, a DLT8000. Line 17 shows the changer. And line 19 shows the 15 slots in the magazine.

Here is the output of devlist:

# camcontrol devlist
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus0 target 0 lun 0 (pass0,ada0)
<Hitachi HDS722020ALA330 JKAOA3MA>  at scbus1 target 0 lun 0 (pass1,ada1)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus2 target 0 lun 0 (pass2,ada2)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus3 target 0 lun 0 (pass3,ada3)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus4 target 0 lun 0 (pass4,ada4)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus5 target 0 lun 0 (pass5,ada5)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus6 target 0 lun 0 (pass6,ada6)
<Hitachi HDS722020ALA330 JKAOA28A>  at scbus7 target 0 lun 0 (pass7,ada7)
<ST380815AS 4.AAB>                 at scbus8 target 0 lun 0 (pass8,ada8)
<TSSTcorp CDDVDW SH-S223C SB01>    at scbus9 target 0 lun 0 (pass9,cd0)
<WDC WD1600AAJS-75M0A0 02.03E02>   at scbus10 target 0 lun 0 (pass10,ada9)
<DEC TL800    (C) DEC 0326>        at scbus12 target 0 lun 0 (pass11,ch0)
<QUANTUM DLT8000 0250>             at scbus12 target 4 lun 0 (pass13,sa1)
<DEC TZ89     (C) DEC 2561>        at scbus12 target 5 lun 0 (sa0,pass12)
<OVERLAND LXB 0524>                at scbus12 target 6 lun 0 (ch1,pass14)
# 

Lines 2-9 are the HDD storage in this system.

Lines 10 and 12 form a gmirror upon which the base OS is installed.

Line 11 is a DVD writer.

Lines 13 & 14 is the old DEC tape library.

Lines 15 & 16 is the new library.

What’s next?

Now that I have done the physical work, I can start the configuration. I’ll do that over the next few weeks or so.

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