Date: Wed, 21 Jun 2000 08:50:20 +1000 From: "Andrew Reilly" <a.reilly@lake.com.au> To: Ryan Turner <ryan@workstation.dhs.org> Cc: freebsd-stable@freebsd.org Subject: Re: 2048 byte media Message-ID: <20000621085020.A52630@gurney.reilly.home> In-Reply-To: <Pine.BSF.4.21.0006140021400.684-100000@workstation.dhs.org>; from ryan@workstation.dhs.org on Wed, Jun 14, 2000 at 12:28:29AM -0400 References: <20000614084825.A51585@gurney.reilly.home> <Pine.BSF.4.21.0006140021400.684-100000@workstation.dhs.org>
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On Wed, Jun 14, 2000 at 12:28:29AM -0400, Ryan Turner wrote:
> Thanks for the information. It looks like I am trying to do the same
> thing as you with a Fujitsu 640M MO drive. I am still having a little
> bit of trouble getting it to work. I have been using FreeBSD for a while
> but have never had to deal with removeable media before this (always
> used /stand/sysinstall). I was hoping you could tell me what steps you
> took to get it working. I have added the disktab entrys you suggested but
> have been unable to get fdisk/disklabel to work.
I don't actually have an unformatted disk handy at the moment,
but I believe that the process is something like:
Use fdisk to create a partition that fills the whole disk, and
mark it active.
fdisk -I da2
fdisk da2 then says:
******* Working on device /dev/da2 *******
parameters extracted from in-core disklabel are:
cylinders=151 heads=64 sectors/track=32 (2048 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=151 heads=64 sectors/track=32 (2048 blks/cyl)
Media sector size is 2048
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 32, size 309216 (603 Meg), flag 80 (active)
beg: cyl 0/ sector 1/ head 1;
end: cyl 150/ sector 32/ head 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
Then use disklabel to put a FreeBSD partition on it. I haven't
figured out any incantation of disklabel that allows it to use
the auto option, but using one of the disktab entries from the
previous mail seems to work:
disklabel -w -r da2 R640
now disklabel da2 says:
# /dev/da2c:
type: SCSI
disk: R640
label:
flags: removeable
bytes/sector: 2048
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 150
sectors/unit: 309216
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
3 partitions:
# size offset fstype [fsize bsize bps/cpg]
c: 309216 0 unused 2048 8192 # (Cyl. 0 - 150*)
Then you put a file system on it with
newfs /dev/da2c
Warning: Block size restricts cylinders per group to 10.
Warning: 8320 sector(s) in last cylinder unallocated
/dev/da2c: 1236864 sectors in 76 cylinders of 1 tracks, 16384 sectors
603.9MB in 8 cyl groups (10 c/g, 80.00MB/g, 9536 i/g)
super-block backups (for fsck -b #) at:
32, 163872, 327712, 491552, 655392, 819232, 983072, 1146912
Then you can mount it, and do with it what you will:
mount /dev/da2c /mnt
df says:
/dev/da2c 1217500 4 1120096 0% /mnt
If anyone knows how to make disklabel behave more nicely, or
knows of a "better" way to do this, I'd love to know, of course.
--
Andrew
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