mowgli@bat.cis.ohio-state.edu (Mowgli Assor) (07/17/90)
We're considering adding a 330 or 660 Megabyte hard drive to our IBM PS/2
Model 80-115. It's got an ESDI drive right now, & it appears the controller
will handle 2 drives. But, I'm not sure. Has anyone added a second hard
drive to their machine? If so, please let me know what you added & how it
went. Can I just buy any old ESDI drive & plug & go?
Thanks, <Mowgli>
-=-
Address: mowgli@puffer.cis.ohio-state.edu (Mowgli Assor in real life)
Or: mowgli@cis.ohio-state.edu, mowgli@osu-20.ircc.ohio-state.edu
The 2 precepts of Semi-Divinity: (1) Mind Thine Own Business.
(2) Don't Worry About It.steve@qe2.paloalto.ibm.com (07/18/90)
In article <82186@tut.cis.ohio-state.edu> Mowgli Assor <mowgli@cis.ohio-state.edu> writes: >We're considering adding a 330 or 660 Megabyte hard drive to our IBM PS/2 >Model 80-115. It's got an ESDI drive right now, & it appears the controller >will handle 2 drives. But, I'm not sure. Has anyone added a second hard >drive to their machine? If so, please let me know what you added & how it >went. Can I just buy any old ESDI drive & plug & go? I have 2 314Meg drives in my Model 80, and it works just fine. I'm not aware of anything special that is required of the drive, so I suspect that you could grab any ESDI drive, plug, and go. I know for certain that Maxtor and IBM ESDI drives work fine under AIX. If you're planning to use DOS or OS/2, you should check the manuals for these products for any mention of using large disks. Note that AIX PS/2 makes no mention of supporting disks larger than 314 Meg, although I know of at least one system that has 2 657Meg SCSI disks attached. Again, your mileage may vary. Caveat hactor..... :-) > Or: mowgli@cis.ohio-state.edu, mowgli@osu-20.ircc.ohio-state.edu Steve DeJarnett Internet: ibmsupt!steve@uunet.uu.net IBM AWD Palo Alto UUCP: uunet!ibmsupt!steve (415) 855-3510 VNET: dejarnet at ausvmq These opinions are my own. I doubt IBM wants them.......
boegehol@informatik.uni-stuttgart.de (JN.V9obQ) (07/20/90)
In article <82186@tut.cis.ohio-state.edu> mowgli@bat.cis.ohio-state.edu (Mowgli Assor) writes: | We're considering adding a 330 or 660 Megabyte hard drive to our IBM PS/2 | Model 80-115. It's got an ESDI drive right now, & it appears the controller | will handle 2 drives. But, I'm not sure. Has anyone added a second hard | drive to their machine? If so, please let me know what you added & how it | went. Can I just buy any old ESDI drive & plug & go? Half a year ago, I added a NEC (oops, forgot the number) ESDI hard disk (147MB formatted) to my PS/2 Model 60-071. It was not quite as easy as plug & go. The problem was the low level formatting of the hard disk. The IBM ESDI Controller expects a "Primary Defect Map" on the second last cylinder of the hard disk. This is of course supplied with all IBM Disks, but not with my brand new NEC disk. The trick is to coerce the controller to ignore the primary defect map and just go ahead and format the disk. The Controller command for formatting has a special bit for that purpose, and I patched the program LLFORMAT.COM on the reference diskette accordingly. I was then able to format the disk with no problem, and I'm now using it with DOS and OS/2 without any special drivers or patches. I think the same procedure should also work for the Model 80 and also for other brands of ESDI hard disks. One problem might be the data transmission speed of the hard disk: The IBM controller is capable of handling up to 10 MBit/s. While experimenting with my NEC harddisk I borrowed a 330MB Disk from my friend's COMPAQ. That disk operates at 15 MBit/s and did not work with my PS/2. I have also heard of commercial software being available to format non-IBM hard disks, but I don't remember the name now. Furthermore, there are ESDI hard disks offered specifically for PS/2 machines. Those should work too, of course. When you actually need the patch for LLFORMAT.COM, please ask again since I don't have it handy right now. Hope that helps Harald Boegeholz
s33966r@kaira.hut.fi (Juha Hulkkonen) (07/22/90)
For some reason I could mail this to Mr. Harald Boegeholz so I posted it here: Hi! I'm having a same kind of problem as Mowgl was claiming about.. I'm also having a PS/2-80 with one 314 MB esdi disk installed and I'd like to get another 300 MB disk (IBM, but not originally formatted for PS/2) running. So, if you could provide thepatched llformat or a pointer to any other suitable low-level formating program I'd be more than happy ;-) Thanx and regards, Juha. -- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + Juha Hulkkonen s33966r@kaira.hut.fi + + hogan @otax.tky.hut.fi + + tel. +358-0-794899 + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
muro@aragon.UUCP (Muriel Rosenberg) (07/27/90)
s33966r@kaira.hut.fi (Juha Hulkkonen) writes: >I'm having a same kind of problem as Mowgl was claiming about.. I'm >also having a PS/2-80 with one 314 MB esdi disk installed and I'd like >to get another 300 MB disk (IBM, but not originally formatted for >PS/2) running. So, if you could provide thepatched llformat or a >pointer to any other suitable low-level formating program I'd be more >than happy ;-) * Boot with the IBM PS/2 Reference Disk * Press ^A in the main menu (undocumented feature) /Muro -- Muriel Rosenberg Klagenfurterstrasse 107 D-7000 Stuttgart muro@aragon.gtc.de