Hi all,
I have problem on detecting my HP DAT 24 external tape drive. There is not useful information on "dmesg". I've also tried "cat /proc/scsi/scsi", but it returns "Attached devices: none" to me. I am not quiet sure why since my SCSI RAID 5 works well.
There could be some helpful information that my scsi HD aren't detected as "sd*", but "/dev/cciss/c0d0*", where "cciss" is the RAID card. I tried "mt -f /dev/cciss/c*" for serval devices there, but none of them is my tape.
Does anyone have ideas?
My server config is as below:
HP Proliant DL380 G3
Xeon 2.8Ghz
1GB ECC 2700 RAM
Compaq Computer Corporation Smart Array 5i/332 (SCSI RAID card)
4 X 36GB HD
HP DAT 24 external tape

thx for your help

I had the same problem with a DLT and a DL380 700mhz. I solved it by getting an adaptec 2940UW card for the tape drive and leaving the RAID cards to the RAID.

BTW, try mt -f /dev/st0 or mt -f /dev/nst0 or mt -f /dev/tape. Tape drives usually come up as st* or nst* (st= rewinding, nst= not-rewindind) BUT.. if you dont see it in your dmesg, then it won't be in your /dev

Thank you for your help, but I have solved this stupid problem already.
All you need to do is add the following script while booting AFTER the system found the RAID card:

echo "engage scsi" > /proc/driver/cciss/cciss0
echo "rescan" > /proc/scsi/cciss0/0
mt -f /dev/st0 setblk

where "cciss" is my SCSI RAID card. You may have different name and numbers. The first two scripts are doing exactly what they said - engaging scsi and rescan scsi devices. The third script will set my tape drive using variable block size, which you may not need.

I also thought about plugging in another SCSI card into our server before I solved this problem, but I found out all PCI slots are 64Bits with 100/133Mhz bus. I am not sure it is backward compatable to 32bits/33Mhz PCI device or not. Buying another 64bits/100Mhz PCI SCSI card, which is very high price, is a bit out of budget :-P

ps. The stupid HP tech support guy told me this RAID card does not support DAT 24e, but my tape drive is working good right now >.<

Hi All,

where exactally you put this lines, I have same problem with Adaptec I2O 2100S

?
echo "engage scsi" > /proc/driver/cciss/cciss0
echo "rescan" > /proc/scsi/cciss0/0
mt -f /dev/st0 setblk