help for etc/disktab

[fabrice T]

I've 8 disks seagate st31200nc on 2 pci adaptec scsi 2940, but how can i my
system freebsd 4.0 detect the disks, but in disktab file the disks are not
presents.
The specifications of disk is :

UNFORMATTED CAPACITY (MB) ________________1258.8
FORMATTED CAPACITY (xx SECTORS) (MB) _____1052.4
AVERAGE SECTORS PER TRACK ________________84
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________24,300
CYLINDERS ________________________________2,700 user
HEADS ______PHYSICAL______________________9
DISCS (3.5 in) ___________________________5
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________26.8 to 47.2
EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
SPINDLE SPEED (RPM) ______________________5411
AVERAGE LATENCY (mSEC) ___________________5.54
BUFFER ___________________________________256/1024 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST
ASA
TPI (TRACKS PER INCH) ____________________3000
AVERAGE ACCESS (ms) (read/write)__________9.3/10.5
Drive level without controller overhead
SINGLE TRACK SEEK (ms) (read/write)_______1.2/1.7
MAX FULL SEEK (ms) (read/write)___________19.4/20.4
MTBF (power-on hours) ____________________500,000
SHOCK (G's):
operating (Read/Write) __________10
nonoperating ____________________75
ACOUSTICS (typ/max dBA) __________________/
POWER REQUIREMENTS: +12V START-UP (amps) _1.5
+12V TYPICAL (amps) __0.5
+5V START-UP (amps) __
+5V TYPICAL (amps) ___0.2
TYPICAL (watts) ______7
MAXIMUM (watts) ______
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE

My mail: tovi...@cnam.fr
Thanks.

[Chris Hedley]

In article <8hj0oi$75d$1...@wanadoo.fr>,

"fabrice T" <tovi...@cnam.fr> writes:
> I've 8 disks seagate st31200nc on 2 pci adaptec scsi 2940, but how can i my
> system freebsd 4.0 detect the disks, but in disktab file the disks are not
> presents.

Can I ask why you need disktab entries? If it's for disklabel, then
"auto" should do the trick; if not, then a minimalistic entry of

st31200nc:ty=winchester:dt=SCSI:rm#5411:se#512:nc#ccc:nt#hhh:ns#ss

should do the trick, where ccc=cylinders, hhh=heads and ss=sectors/track.
These settings should probably be taken from what the bios thinks is
your disc geometry rather than what the spec sheet says AFAIK.

Chris.