Old interfaces (removable unless noted)
=======================================
disk cap. sec/trk trk/cyl cyl notes
================ via PDP-11 RK-11, PDP-8 RK8
RK02 1.2M 12 2 203 Diablo model 30 low density (256B sect)
avg seek: 70ms (15ms min)
1500 rpm; avg rot delay: 20ms
xfer: 22.2us/word
1100 BPI max
RK03 2.5M 12 2 203 Diablo model 30 high density (512B sect)
avg seek: 70ms (15ms min)
1500 rpm; avg rot delay: 20ms
xfer: 11.1us/word
2200 BPI max
RK05(J) 2.5M 12 2 203 1500rpm; RK03 cartridge;
RK8 max xfer 1.44Mb/s (8.32us/wd 1.1??)
seek: 50ms/10ms/85ms
RK05F 5M 12 2 203 1500rpm; fixed rk05; 2xRK05 to s/w
================
RK06 13M 22 3 411 2400rpm; dec built
RK07 27M 22 3 823 2400rpm; dec built;
xfer 538KB/s; lat=12.5ms
seek: 36.5ms avg, 8.5ms min
avg access 49ms
Massbus
=======
disk cap. sec/trk trk/cyl cyl notes
RM02 67M 32 5 823 pack; CDC 9762; 2400 rpm
xfer=6.4Mb/s (806KB/s); avg acc 42.5ms
seek 30ms (avg), 6ms (min)
avg latency 12.5ms
RM03 67M 32 5 823 pack; CDC 9762; 3600 rpm
xfer=9.6Mb/s (1.2MB/s); avg acc 38.3ms
seek 30ms (avg), 6ms (min)
avg latency 8.3ms
RM05 256M 32 19 823 pack; CDC 9766
RM06 ?
>You can use an RM05 with an 11/750, but it's possible that the packs
>in question were also used with a PDP-11. Knowing a little about the
>source might help extraction (although sticking an RM05/9766 on a
>suitably equipped VAX under UNIX and using 'dd' could get you a disk
>image file).
BUT, can you use it if the RM05 was written on a 36-bit PDP-10 system? On a positive note, after doing some looking it seems most likely that the data was written on either a PDP-11/70 or a VAX.
The idea of getting a disk image of the disks is probably the best, and it can be done with more than just a VAX running UNIX, it can also be done using VMS, and can also be done on a PDP-11. It looks like SIMH supports RM05's, so it would be a simple matter of booting the right OS in SIMH, and reading the data that way. Getting data out of SIMH would be tricky, but not impossible.
Zane
--
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh_at_aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
Received on Sun Feb 27 2005 - 13:35:59 GMT