greg@gagme.chi.il.us (Gregory Gulik) (06/24/91)
By popular demand, I'm posting a summary of what I did
to make a Maxtor 1140 work on a 3B2/300.
(Anybody working on a FAQ for the 3B2?? These instructions
SHOULD work for just about any MFM hard drive)
[Before starting, make sure you have the 3B2 Computer ]
[Maintenance Manual. This manual includes the famous ]
[idtools diskette which contains the utilities to format]
[an MFM hard drive and run various diagnostics. I don't]
[know what number to call, but the code is 305-395 ]
I wanted to install this drive in my XM replacing the
30 MB CDC that was there before. It fit in the slot
just fine.
To select this drive as Drive 1, move the jumper on the
row of six pins over 1. Also, this drive did not have a
terminator, so I took the one off the CDC I removed and
stuck it in the socket near the back of the drive. I
popped it in the computer, powered it on, no smoke rose
from the box, and I rejoiced.
The next problem I ran across is not having any documentation
having bought the drive used. According to replies I received
from my posting to the net, the drive is listed as having
918 cylinders, 15 heads (tracks per cylinder), 18 sectors
per track, 512 bytes per track. The drive ID is 11.
The interesting "feature" of this drive (maybe others) is
that it is possible to format it to 1224 cyclinders. The
3B2 however has a limit of 1024 cyclinders. I tried that
number and had absolutely no problems formatting. Also,
somebody suggested I verify it a couple times. So, I
verified the format 3 times, with no errors popping up.
Then, I rebooted my system. It automatically found the
new drive, and it of course complained about the VTOC
being bad. Something I forgot to do was remove my old
hard drive from the fstab file. I did that by using
the sysadm command under the hard disk menu to remove
a hard drive. I then rebooted the system, and it looked
ok. Then, I proceeded to partition the hard drive using
the partition option under sysadm.
Unfortunately, sysadm does not provide enough control
over the partitioning, so I decided to use the mkfs command
so I could allocated more inodes since I was going to
use this drive for a news spool. I then went through
the /etc/fstab file to make sure everything was going
to be mounted properly and that's it!
I'd like to once again thank everyone who came to my
aid and gave me pointers on how to do this.
Questions I still have:
1) Is there a way to accurately test the data transfer
rate on a disk attached to the 3B2? I wanted to
try different gaps, but I had to way of knowing which
is best.
2) Has anyone done this using an XDC? Is the process
any different?
3) Where can I get more terminators?
--
Gregory A. Gulik Call Gagme, a public
greg@gagme.chi.il.us || gulik@depaul.edu access UNIX system at
|| gulik@motcid.rtsg.mot.com (312) 714-8568friedl@mtndew.Tustin.CA.US (Stephen J. Friedl) (06/24/91)
Gregory Gulik posts the informative article: > > By popular demand, I'm posting a summary of what I did > to make a Maxtor 1140 work on a 3B2/300. > > [Before starting, make sure you have the 3B2 Computer ] > [Maintenance Manual. This manual includes the famous ] > [idtools diskette which contains the utilities to format] > [an MFM hard drive and run various diagnostics. I don't] > [know what number to call, but the code is 305-395 ] # ------------------------------------------------------------------------ This manual and disk can be ordered from the AT&T Customer Information Center in Indianapolis, IN. It has select code 305-395, and at press time it sold for about $65. The AT&T CuIC can be reached at: (800) 432-6600 Continental US (800) 255-1242 Canada (317) 352-8556 elsewhere The CuIC takes phone orders with a credit card, and with a purchase order for qualifying companies. They have many other UNIX-related books as well, so be sure to ask for their free "AT&T Documentation Guide", select code 000-011. # ------------------------------------------------------------------------ > The drive ID is 11. Not necessarily. The drive ID type is a magic number whose only purpose is to get you a size when doing an /etc/prtconf. Figure out how big your drive is in megabytes, and do the following: # cd /dgn # edittbl -s -l It will list a bunch of id types and device names. Most of the device names will be of the form "HD72". If you see one of these names that matches the true size, pick that ID when formatting. Otherwise you can add your own entry to the system. First pick an ID that is otherwise unused, then do the following (I'm using 0x0f and HD999 as examples): # cd /dgn # edittbl -s -i utility program for edt_data Enter subdevice data Enter subdevice ID code: 0x0f ^^--- enter unused ID type Enter subdevice name: HD999 ^^^^^----- pick anything starting with "HD" Enter device name: SBD ^^^---------- this is always the system board Enter subdevice ID code: . ^------ this ends the input # Now when you run an /etc/prtconf, it will print "999 megabyte disk" in the entry. This is of course a small matter, but it is fun to suddenly have a 900 MB drive on your system -- fool your friends! > The interesting "feature" of this drive (maybe others) is > that it is possible to format it to 1224 cyclinders. The > 3B2 however has a limit of 1024 cyclinders. This is actually a restriction on the idtools formatter, not on the 3B2 itself. I know that people have made 1224 cylinder drives work (but I have no idea how to do it myself). > 3) Where can I get more terminators? You might talk to Arnold about this one :-) Steve -- Steve Friedl, Resident Wizard / friedl@vsi.com / {uunet attmail}!vsi!friedl V-Systems, the VSI*FAX people / Santa Ana, CA / +1 714 545-6442v 545-7653 fax Two things for sure: death and faxes