UNIX for Dummies Questions & Answers

Hi,

I am trying to write to a dat tape, using HP UX 10.20

tar: cannot open /dev/dat

not mounted ?

ioscan ? if so, then where ?

suggestions ?

thanks
simon

Hi,

Is the tape recognized ? What is the tape device ?
Can you do a "ioscan -funC tape" and post the results here ?

here you go. It' an SCSI HP DAT drive

******

Class I H/W Path Driver S/W State H/W Type Description
==========================================================================
lan 0 10/0/12/0 btlan3 CLAIMED INTERFACE HP PCI 10/100Base-TX Core
/dev/ether0 /dev/lan0
audio 0 10/0/13/0 audio CLAIMED INTERFACE Built-in Audio
/dev/audio /dev/audioEA /dev/audioIL_0 /dev/audioNA
/dev/audioBA /dev/audioEA_0 /dev/audioIU /dev/audioNA_0
/dev/audioBA_0 /dev/audioEL /dev/audioIU_0 /dev/audioNL
/dev/audioBL /dev/audioEL_0 /dev/audioLA /dev/audioNL_0
/dev/audioBL_0 /dev/audioEU /dev/audioLA_0 /dev/audioNU
/dev/audioBU /dev/audioEU_0 /dev/audioLL /dev/audioNU_0
/dev/audioBU_0 /dev/audioIA /dev/audioLL_0 /dev/audio_0
/dev/audioCtl /dev/audioIA_0 /dev/audioLU
/dev/audioCtl_0 /dev/audioIL /dev/audioLU_0
disk 0 10/0/14/0.0.0 sdisk CLAIMED DEVICE HL-DT-STIDE CDROM
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
ctl 0 10/0/14/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c0t7d0
tty 0 10/0/14/1/1 asio0 CLAIMED INTERFACE Built-in RS-232C
/dev/cul00 /dev/diag/mux0 /dev/mux0 /dev/tty0p0 /dev/ttyd00
tty 1 10/0/14/1/2 asio0 CLAIMED INTERFACE Built-in RS-232C
/dev/dg /dev/diag/mux1 /dev/mux1 /dev/tty1p0
ext_bus 1 10/0/14/1/3 SCentIf CLAIMED INTERFACE Built-in Parallel Interface
/dev/c1t0d0_lp
floppy 0 10/0/14/1/4.1 sioflop CLAIMED DEVICE HP_PC_FDC_FLOPPY
/dev/floppy/c0t1d0 /dev/rfloppy/c0t1d0
usb 0 10/0/14/2 hcd CLAIMED INTERFACE Built-in USB Interface
usbhub 0 10/0/14/2.1 hub CLAIMED DEVICE USB Root Hub
/dev/hub
usbhid 0 10/0/14/2.1.2 hid CLAIMED DEVICE USB HID Mouse(0)
/dev/hid/firstkbd /dev/hid/hid_007 /dev/hid/kbd_000 /dev/hid/mouse_001
/dev/hid/firstmouse /dev/hid/hid_008 /dev/hid/kbd_001 /dev/hid/mouse_002
/dev/hid/hid_000 /dev/hid/hid_009 /dev/hid/kbd_002 /dev/hid/mouse_003
/dev/hid/hid_001 /dev/hid/hid_010 /dev/hid/kbd_003 /dev/hid/mouse_004
/dev/hid/hid_002 /dev/hid/hid_011 /dev/hid/kbd_004 /dev/hid/mouse_005
/dev/hid/hid_003 /dev/hid/hid_012 /dev/hid/kbd_005 /dev/hid/mouse_006
/dev/hid/hid_004 /dev/hid/hid_013 /dev/hid/kbd_006 /dev/hid/mouse_007
/dev/hid/hid_005 /dev/hid/hid_014 /dev/hid/kbd_007
/dev/hid/hid_006 /dev/hid/hid_015 /dev/hid/mouse_000
usbhid 1 10/0/14/2.1.3 hid CLAIMED DEVICE USB HID Kbd(1)
ext_bus 2 10/0/15/0 c720 CLAIMED INTERFACE Ultra Narrow Single-Ended SCSI
tape 0 10/0/15/0.3.0 stape CLAIMED DEVICE HP C1537A
/dev/rmt/0m /dev/rmt/0mnb /dev/rmt/c2t3d0BESTn
/dev/rmt/0mb /dev/rmt/c2t3d0BEST /dev/rmt/c2t3d0BESTnb
/dev/rmt/0mn /dev/rmt/c2t3d0BESTb
ctl 1 10/0/15/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c2t7d0
ext_bus 3 10/0/15/1 c720 CLAIMED INTERFACE Ultra2 Wide LVD SCSI
disk 1 10/0/15/1.1.0 sdisk CLAIMED DEVICE SEAGATE ST336704LW
/dev/dsk/c3t1d0 /dev/rdsk/c3t1d0
disk 2 10/0/15/1.2.0 sdisk CLAIMED DEVICE SEAGATE ST336704LW
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0
disk 3 10/0/15/1.5.0 sdisk CLAIMED DEVICE HP 18.2GST318406LC
/dev/dsk/c3t5d0 /dev/rdsk/c3t5d0
disk 4 10/0/15/1.6.0 sdisk CLAIMED DEVICE SEAGATE ST318406LC
/dev/dsk/c3t6d0 /dev/rdsk/c3t6d0
ctl 2 10/0/15/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c3t7d0
graphics 0 10/6/2/0 graph3 CLAIMED INTERFACE PCI(103c1008) -- 2

The tape is well recognized, you must use one of its's devices:

/dev/rmt/0m /dev/rmt/0mnb /dev/rmt/c2t3d0BESTn
/dev/rmt/0mb /dev/rmt/c2t3d0BEST /dev/rmt/c2t3d0BESTnb
/dev/rmt/0mn /dev/rmt/c2t3d0BESTb

You're trying to access /dev/dat, but there's no device with that name...

well that is another issue :-)

How do I know which one

/dev/rmt/0m
/dev/rmt/0mb
/dev/rmt/0mn

is the HP dat ?

thanks again ..

All those devices belong to the same tape, they just represent diffent ways to use it:

0 is the device number

/dev/rmt/0m - at&t style
/dev/rmt/0mb - berkeley style
/dev/rmt/0mn - at&t style, no rewind
( ... )

thanks so much for your help.. off I go