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- Newsgroups: comp.sys.next.sysadmin
- Path: sparky!uunet!proforma!jgg
- From: jgg@proforma.com (J. G. Gregory)
- Subject: What the heck is a "magic number"?
- Message-ID: <1992Sep2.134246.274@proforma.com>
- Keywords: floppy
- Sender: jgg@proforma.com
- Organization: Pro Forma
- Date: Wed, 2 Sep 1992 13:42:46 GMT
- Lines: 37
-
- I have reported this problem to the beta bug mailing list, but other than an
- acknowledgement, I received no reply. Now that 3.0 is out, (but I don't yet
- have it), I need some net advice on what to do. I absolutely have to get some
- floppies made.
-
- I insert a brand new Toshiba PMF-2ED "4mb" floppy into my PLI SuperFloppy 2.88
- SCSI drive. It correctly reports that it is unreadable, and I select
- "initialize".
-
- According to the console, the formatting works ok, but when newfs is run, it
- reports this:
-
- ...
- creating new filesystem on /dev/rsd1a
- /usr/etc/newfs -n -v /dev/rsd1a
- setting optimization for space with minfree less than 10
- /etc/mkfs /dev/rsd1a 2784 18 2 8192 1024 16 0 5 2048 s
- Warning: 24 sector(s) in last cylinder unallocated
- /dev/rsd1a: 2784 sectors in 78 cylinders of 2 tracks, 18 sectors
- 2.9Mb in 5 cyl groups (16 c/g, 0.59Mb/g, 192 i/g)
- super-block backups (for fsck -b#) at:
- 16, 616, 1168, 1768, 2320,
- cg 0: bad magic number
- /usr/etc/newfs /dev/rsd1a failed (status 1)
-
- This "cg 0: bad magic number" is a problem. I have tried doing all most of the
- initializing manually, but I always get a "bad magic number" report before
- failure. Now I have 3 questions:
-
- 1. Has anyone else had this problem on 3.0PR2 (or PR1)?
-
- 2. Is there anything else I can try?
-
- 3. What the hell is the magic number, anyway?
-
- Thanks in advance.
- --J Gregory
-