EZDOS322
EZ-Tape
V3.22 DOS Backup Software Thanks to Niels C.
Grønlund 190-051 IBM PS/2 ITBU Installation Kit A 65SX and 8580 190-181 IBM PS/2 ITBU Installation Kit B 65SX, 80, 90 and 95 191-093 IBM PS/2 ITBU Installation Kit C 8540, 8565, 8580, 8590 and 8595 193-126 IBM ITBU Installation Kit D NOTE: Allows PS/2 ITBU drive to be used in: VP 6382, 6384, 6387, PS/1 2155, EduQuest 9603, 9604, 9605 itbudiag.exe Internal Tape (ITBU) diags ver 2.0 itbuopt.exe ITBU Opt/Diag & Adapter Diskettes Looks like the diagnostics are from PS2TAPE from Irwin Magnetic Systems Inc. ITBU Main PCB ITBU Main PCB 4302005 ![]()
ITBU Frame
J8
Pinout > What is the purpose of the 10 pin header J8 to the immediate left of the edgecard? It has a two wire jumper on the second pin pair from the edgecard. Rick Ekblaw reaches way up and snags it with:
Internal Tape Backup Unit Installation Kits for PS/2s ![]() The IBM PS/2 Internal Tape Backup Unit is an internally mounted product that performs fixed disk backup and restore for the following IBM PS/2 products. 30F5279 Installation Kit A 65SX, 8580 64F7465 Installation Kit B 65SX, 80, 90 and 95 87F9826 Installation Kit C 8540, 8565, 8580, 8590 and 8595 Not sure of this snippet from the EPRM: 8525, 30, 50, 55, 60, 65, 70, 80, 9556, 57, 76, 77 IBM PS/2 INTERNAL TAPE INSTALLED IN 95XX Record number: H12308 Customers that have installed a IBM Internal tape drive in the following machines 9557 And are having trouble using their tape drive. Check to see if the tape drive is connected to the third berg connector (usually the nearest connector to the motherboard). This cable will usually have a mark on the connector with the following labels:
P2-2 The tape drive generally will be connected
to the second berg, but to be correct it should be
installed in the 3rd connector and the 3rd drive bay of
these boxes 9577, 9557. **PS/2's that have 3 berg connectors on them could also be 8590 and 8595. NOTE:
In the case of machines running 4680 OS, the 2nd
connector of the cable should be used. Keep in mind that
DIAGNOSTICS MAY FAIL WHEN THE TAPE DRIVE IS ATTACHED TO
THE 2ND DROP. ITBU Use on Later Systems >I have never been able to get the PS2-Tape working on 9595 type 4 complex. No problems on an 8595 or a SCSI MB 77. Peter utters: The unit allows the user to transfer up to 80MB or 120MB of data from a fixed disk to a removable tape cartridge. The tape drive slides into the Diskette Drive B slot in the PS/2. The ITBU uses a 3.5" mini tape cartridge. The following
cartridges are supported: Any media that meet the specification in the Proposed ANSI Standard X335/87-218 "Unrecorded Magnetic Tape Mini-cartridge" for Information Exchange. The tape unit requires the IBM PS/2 ITBU Backup program for operation. This program is not provided with this option. (PCTOOLS V-7.x and other Utilities) Accelerator Cards Irwin 4100MC 1-Mbit (MCA)
ADF Sections for 4100MC HIGHLIGHTS o Supports Models 50, 60, 70, and 80 o Up to 80Mb storage capacity o Supports data interchange between PS/2 Models 50, 60, 70, or 80 o Internal unit 3.25" form factor o Slides into existing diskette controller (Drive B position) o Accurate head positioning using closed-loop embedded servo o Uses 1/4" tape mini-cartridges o Backup rate approximately 2Mb/minute. EXTENDED LENGTH MINI TAPE
CARTRIDGES: Installing the Tape Unit
Cleaning the Tape Unit
Read/Write Head ITBU AIX Drivers >Can aix 1.2 talk to the internal tape unit? That's the one that sits in the second drive bay on a model 70. If so, what device does it respond to? Harry Haas The driver works fairly well, but you cannot mount the
drive, only backup and restore to/from it. Also the
documentation on the RPQ is vertually non-existant. You
have to read through the file: Jerry Queirolo PS/2 ITBU and '/etc/backup'
inefficiency It turns out that the 'backup' program (when invoked with -f/dev/rst0) defaults to a tape density (d) of 700 bytes per inch and a tape length(s) of 4500 feet. That works out to a limit of 36,000 1K blocks per tape cartridge. In other words, 'backup' does not automatically determine the type of cartridge installed and write an amount of data appropriate to the installed cartridge. The documentation tells us we CAN'T change the density parameter or the tape length parameter when used with the ITBU. This morning I tried playing around with the -d and -s parameters and I can now say that the documentation is wrong. It is possible to tweak these values and have 'backup' use much more of the tape cartridges. There are several known facts: The ITBU hardware uses 32 data
tracks. A little on the conservative side, I want 'backup' to use only 75 MB of a DC2080 tape and 115 MB of a DC2120 tape (to allow for bad blocks which should be formatted out). So ... Total Capacity = tape density * tape length * 12 tape density = Total Capacity /
(tape length * 12) The tape density is the same for both DC2080 and DC2120 tapes, the increased capacity is due only to the increased tape length. - - - - - - - - - - Cut here for future reference - - -
- - - - - - - - find . -print ! /etc/backup -s 6560 -d 1000 -i -v -f/dev/rst0 For DC2120 tapes: find . -print ! /etc/backup -s 9840 -d 1000 -i -v -f/dev/rst0 - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - Diskette Drive 34-Pin to ITBU 40-Pin Connector (Adapter Cable 34F2717) Included in Internal Tape Backup Unit Installation Kit B This is from the EPRM, and it agrees with the table in 64F7470 / G571-0204-00
In practice, manufacture of this cable is fairly straightforward. Cut a short piece of 34 way ribbon cable (about 6cm). Fit the 34 way header connector in the normal way, remembering that the edge with the red stripe goes to pin 1. Separate out wires 3 and 6 for most of the length of the cable, leaving about 1cm intact nearest the header connector. Cut the three main parts of the cable (wires 1-2, 4-5, and 7-34) back to about 3cm in length. Trail wires 3 and 6 across the surface of the rest, and hold temporarily in place with a small piece of sticky tape. Fit the edge connector loosely, making sure that the wires all go in the right connectors (a gap of one wire between each of the first three sections, counting from pin 1, a 3 wire gap to the single wire from pin 3 on the header, and a 1 wire gap between that and the final wire (from pin 6 on the header). When all is in place, crimp it all home. It may be worth winding some wide tape round the cable,
transversely, to avoid the two single wires snagging on
something when the cable is fitted. > Is there a utility for formatting rhomat tapes of 120 meg? I have formatted many of the 80 meg but my utility doesn't include 120 meg and they show only 80 meg when using that utility. Bob Eager sez > The 2120 will work; so will the 2080. However, it needs to be the Rhomat format with special servo tracks. Either get Rhomat format tapes, or get truly blank tapes and format them (takes 2-3 hours). Just to expound on that last point a bit: When Bob says "truly blank", he means it. I had received a small herd (30 to 40) of DC2120 Ximat tapes that I wanted to reformat and use in the ITBU. Since I have a Taberaser 409 available to me at work (a 40-plus pound monster of a tape degausser, intended to work with reel tapes, including the old wide reel-to-reel video tapes), I figured that erasing the DC2120 tapes would be easy. Each one I tried would start running the format procedure, and fail after an hour or so. Then I got the word that they had to be *really* erased to reformat to Rhomat. So I took the tapes back to the Taberaser, placed them metal side up, and hit each one with 4 erase cycles. Every single tape then formatted properly (running PMTAPE under OS/2, of course, but I would expect that the DOS version of the ITBU tape program would work as well). Rick Ekblaw @707E.ADF Irwin 4100MC Controller I/O Addresses Interrupt Request Level
Arbitration Level Fairness On/Off |