Disklabel V4.0 for 18Gb Drives ST318404L MAG3182L

[Scot Needy]

Hi,

It's been a long time for me. I have 6 new drives that I need to format, all 18Gb.
SEAGATE ST318404L
FUJITSU MAG3182L

Do I need to add an entry in /etc/disktab or is there an easier solution. If not does anyone have a sample disktab?

[Rob Leadbeater]

Hi,

On 4.0F, you should just be able to write a standard label with "disklabel -wr rzN" and then edit it as required...

Cheers,

Rob

[Scot Needy]

Right but the disklabel uses /etc/disktab for the drive geometry. I know for instance a 9gb disk is rz29b. But what can I use for the type hear?


disklabel -wr /dev/rrz9a RZ29B put the wrong geometry on the drive.

Thanks

[Rob Leadbeater]

Hi,

If a disk type isn't in /etc/disktab, it appears to just use a default geometry.

Just tried this on a 36GB disk and it works fine - see attached.

On 4.0F you don't need to use the drive type. You only mentioned 4.0 though... what specific version are you running (sizer -v)

Cheers,

Rob

P.S. A 9GB drive is an RZ40, not RZ29.

[Scot Needy]

4.0 D

I can use disklabel -p /dev/rrz9a
which prints.
# /dev/rrz9a:
type: SCSI
disk: ST318404
label:
flags: dynamic_geometry
bytes/sector: 512
sectors/track: 248
tracks/cylinder: 19
sectors/cylinder: 4712
cylinders: 7508
sectors/unit: 35378533
rpm: 7200
interleave: 1
trackskew: 45
cylinderskew: 39
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0

8 partitions:
# size offset fstype [fsize bsize cpg]
a: 131072 0 unused 0 0 # (Cyl. 0 - 27*)
b: 262144 131072 unused 0 0 # (Cyl. 27*- 83*)
c: 35378533 0 unused 0 0 # (Cyl. 0 - 7508*)
d: 0 0 unused 0 0 # (Cyl. 0 - -1)
e: 0 0 unused 0 0 # (Cyl. 0 - -1)
f: 0 0 unused 0 0 # (Cyl. 0 - -1)
g: 17492658 393216 unused 0 0 # (Cyl. 83*- 3795*)
h: 17492659 17885874 unused 0 0 # (Cyl. 3795*- 7508*)

but cannot read (-r) or edit (-e). Nor can I newfs the partition.

[Steven Schweda]

> [...] but cannot read (-r) or edit (-e).

"I cannot" is not a useful problem
description. Actual command(s)? Actual
output?

> Nor can I newfs the partition.

Which partition is "the partition"?

As usual, showing actual commands with their
actual output can be more helpful than vague
descriptions and interpretations.

[Rob Leadbeater]

OK, on 4.0D you do need to specify a type, however that doesn't have to be in /etc/disktab.

From the manpage for disklabel:

"If your disk type is not specified in the /etc/disktab file, disklabel uses the default partition information in the driver."

Therefore something like this:

# disklabel -wr rz9 wibble

should work fine.

As Steven says, seeing exactly what you're doing would be useful...

Cheers,

Rob

[Scot Needy]

Ok, I think I have it now. I got rz9 working. I was thinking I needed to use a valid entry from /etc/disktab.
These were the same errors I got with rz9.

# disklabel -r rz11
Disk is unlabeled or, /dev/rrz11a does not start at block 0 of the disk

# disklabel -p rz11
# /dev/rrz11a:
type: SCSI
disk: MAG3182L
label:
flags: dynamic_geometry
bytes/sector: 512
sectors/track: 248
tracks/cylinder: 19
sectors/cylinder: 4712
cylinders: 7508
sectors/unit: 35378533
rpm: 10025
interleave: 1
trackskew: 71
cylinderskew: 101
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0

8 partitions:
# size offset fstype [fsize bsize cpg]
a: 131072 0 unused 0 0 # (Cyl. 0 - 27*)
b: 262144 131072 unused 0 0 # (Cyl. 27*- 83*)
c: 35378533 0 unused 0 0 # (Cyl. 0 - 7508*)
d: 0 0 unused 0 0 # (Cyl. 0 - -1)
e: 0 0 unused 0 0 # (Cyl. 0 - -1)
f: 0 0 unused 0 0 # (Cyl. 0 - -1)
g: 17492658 393216 unused 0 0 # (Cyl. 83*- 3795*)
h: 17492659 17885874 unused 0 0 # (Cyl. 3795*- 7508*)

# disklabel -r rz11
Usage:
...

# disklabel -wr rz11 MAG3182L
# disklabel -r rz11
# /dev/rrz11a:
type: SCSI
disk: MAG3182L
label:
flags: dynamic_geometry
bytes/sector: 512
sectors/track: 248
tracks/cylinder: 19
sectors/cylinder: 4712
cylinders: 7508
sectors/unit: 35378533
rpm: 10025
interleave: 1
trackskew: 71
cylinderskew: 101
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0

8 partitions:
# size offset fstype [fsize bsize cpg]
a: 131072 0 unused 0 0 # (Cyl. 0 - 27*)
b: 262144 131072 unused 0 0 # (Cyl. 27*- 83*)
c: 35378533 0 unused 0 0 # (Cyl. 0 - 7508*)
d: 0 0 unused 0 0 # (Cyl. 0 - -1)
e: 0 0 unused 0 0 # (Cyl. 0 - -1)
f: 0 0 unused 0 0 # (Cyl. 0 - -1)
g: 17492658 393216 unused 0 0 # (Cyl. 83*- 3795*)
h: 17492659 17885874 unused 0 0 # (Cyl. 3795*- 7508*)
# newfs /dev/rz11c
Warning: 3876 sector(s) in last cylinder unallocated
/dev/rrz11c: 35378532 sectors in 7509 cylinders of 19 tracks, 248 sectors
17274.7MB in 470 cyl groups (16 c/g, 36.81MB/g, 8832 i/g)
super-block backups (for fsck -b #) at:
...
Thanks to all.

[Rob Leadbeater]

Glad you worked it out. Remember to say thanks by assigning points.

By the way, is there any particular reason that you're using UFS rather than AdvFS ? I don't think I've ever used newfs on Tru64/Digital Unix...

Cheers,

Rob