Subject: Re: 1.5_ALPHA2, newfs and rz56
To: John Hayward <>
From: Tom G. Christensen <>
List: port-vax
Date: 09/17/2000 20:17:44
On Wed, 13 Sep 2000, John Hayward wrote:

> Dear Vax Fans,
>    I reciecently installed 1.5_ALPHA2 on a MicroVax 3100.  Because I had
> difficulty with making a file system I have the system netbooting with 
> / mounted via nfs.
>    After I label the disk and in the process of doing a newfs it proceeds
> to print the backup super blocks then stops with the following error
> message:
> write error: 0
> wtfs: Read-only file system
> Follwing that the disk label is messed up.
Last time I had this problem, I ended up wiping the first 2K of the disk
with dd, then labelling it again and the problem was gone.

> Mike Dowden suggested a low level format and I found that test 75 on the 
> 3100 console provided for formatting a scsi drive.  This was performed
> successfully - so I believe the hardware is ok.
> Is anyone else seeing these kind of problems?
I just installed the 1.5_ALPHA2 snapshot on my VS4000/M60 yesterday using
a RZ56 disk as the target.
Prior to the install the disk was disklabeled using and 1.4Y kernel, but
the install program disklabeled and newfs'ed it again with no problems.

The RZ56 is sharing the scsi-chain with a RZ58 and a Quantum LPS540.

> I note that 1632*15*53 = 1297440 where the dmesg indicates 1299174
> I don't know if that is because of bad sector forwarding or different
> number of sectors per track over the disk or something else.
1299174 should be the correct number of sectors for a RZ56, atleast it's
what was used to disklabel the thing here.


Tom G. Christensen, Denmark <>
Linux 2.2.16 on an i586