Firewire drives, FreeBSD 4.10 and readonly errors
doconnor at gsoft.com.au
Wed Jul 7 18:18:40 PDT 2004
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On Wed, 7 Jul 2004 07:09, Duncan Barclay wrote:
> My prefered partitioning is to create one MSDOS slice of 1G with a copy of
> a miniinst ISO, a dump of / and /usr and a README detailling how to
> reconstruct a server. The rest of the drive is a single UFS slice with the
> important user data. I do this, so that if anything happens all that needs
> to happen is to plug the drive into some h/w (via USB or Firewire) and burn
> a CD to rebuild the server.
Neat idea :)
> Then newfs_msdos the first slice, but I get:
> # newfs_msdos /dev/da0s1
> /dev/da0s1: 2084280 sectors in 260535 FAT32 clusters (4096 bytes/cluster)
> bps=512 spc=8 res=32 nft=2 mid=0xf8 spt=63 hds=255 hid=63 bsec=2088387
> bspf=2036 rdcl=2 infs=1 bkbs=2
> newfs_msdos: /dev/da0s1: Read-only file system
> As these drives come pre-formatted with a single slice I have tried:
> # dd if=/dev/zero of=/dev/da0s1 bs=2048 count=1024
> dd: /dev/da0s1: Read-only file system
> 1+0 records in
> 0+0 records out
> 0 bytes transferred in 0.028599 secs (0 bytes/sec)
> What am I doing wrong to get the read-only errors?
> I have rebooted between writing a blank partition table and trying the
> newfs_msdos to no avail. Other than this error (that prevents a
> fsck_msdos -p from completing) writes are fine.
Can you try
fdisk -I da0
disklabel -e da0s1
[ .. ]
Also try editing the partition table and changing it to a DOS partition and
seeing if newfs_msdos works?
> BTW, I can recommend the Maxtor OneTouch products-they come in a nice
> chassis and are a robust product with Firewire and USB2 interfaces. As a
> backup (not archive) media they are ideal, far cheaper than tape. I have
> used them a number of times and provide my clients with a least two drives
> to use on rotation. This is more for disaster recovery than anything. The
> clients are instructed to keep at least one drive off the premesis.
I've used them (had to get a patch from Mr Firewire before they'd work :)
I prefer Mapower aluminium cases, cheaper and you can customise the drive.
(And they seem to work just as well.. probably got the same interface)
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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