home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.unix.ultrix
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!haven.umd.edu!decuac!pa.dec.com!nntpd2.cxo.dec.com!nabeth!alan
- From: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Subject: Re: Need disktab for 1.2GB Toshiba MK-538FB
- Message-ID: <1992Nov6.205520.11208@nntpd2.cxo.dec.com>
- Lines: 45
- Sender: alan@nabeth (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Reply-To: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Organization: Digital Equipment Corporation
- References: <1992Nov6.152430.27396@hubcap.clemson.edu>
- Date: Fri, 6 Nov 1992 20:55:20 GMT
-
-
- In article <1992Nov6.152430.27396@hubcap.clemson.edu>, tlihsin@hubcap.clemson.edu (lih-sin the) writes:
- >
- >Hi,
- > We just received a 1.2GB Toshiba MK538FB disk drive and we would like
- >to install it on a DECstation 3100 running Ultrix V4.1. For that purpose
- >we need to get the disktab for the hard drive.
-
- Did the drive come with any documentation? From that you should
- be able to determine the geometry information desired by the
- disktab entries ns, nt and nc. The type field (ty) will almost
- certainly be "winchester", but I'm not familiar with the disk.
- The partition information can really be whatever you want. ULTRIX
- will provide a default partition table that only has the A, B, C
- and G partitions:
-
- A: Start = 0, Length = 32,768
- B: Start = 32,768, Length = 131,072
- C: Start = 0, Length = Size of disk.
- G: Start = 163,840, Length = remainder of disk.
-
- Most disktab entries use 8192 for the block size and 1024 for the
- fragment size. For some reason the B partitions always seem to use
- 4096 for the block size and 512 for the fragment size.
-
- If you don't have the drive documentation, you can write a fairly
- simple program that uses the DEVGETGEOM I/O control (devio(4)) to
- ask the drive what it's geometry is and then construct a disktab
- from that. Or you can use the creatediskbyname(3) library function
- to get all the information you need for the disktab entry and
- format it into an entry.
-
- >Also do I have to run Ultrix 4.2 or higher in order the DECstation
- >to accept 1.2GB disk?
-
- If you want to use all 1.2 GB, yes. ULTRIX is limited to 2^21 LBNs.
- Attempting to use more causes the I/O request to wrap around to the
- beginning of the disk, making life very interesting for your data.
-
- >
- > Thanks in advance,
- > tlihsin@hubcap.clemson.edu
- --
- Alan Rollow alan@nabeth.cxo.dec.com
-
-