| Title: | AMIGA NOTES |
| Notice: | Join us in the *NEW* conference - HYDRA::AMIGA_V2 |
| Moderator: | HYDRA::MOORE |
| Created: | Sat Apr 26 1986 |
| Last Modified: | Wed Feb 05 1992 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 5378 |
| Total number of notes: | 38326 |
There have been lots of questions asked about different hard disks.
So I thought I would compile what information I have in one note.
This is mostly for Segate drives if anyone has info on other drives this
might be a good place to put it.
This information is from the Segate Universal installation handbook.
They rate the ST412 MFM encoding drives at 5.0 megabit/sec, and the RLL
encoded drives at 7.5 Megabits/sec.
Basic Spec ST213 ST225 ST4026
----------------------------- ----- ----- ------
Formatted Capacity 10.7 21.4 21.4
Read/Write heads 2 4 4
Data Cyls 615 615 615
Step pulse (usec) 5 to 200 5 to 200 25 to 50
Average access time (msec max) 65 65 65
Operating temp (C) 10 to 45 10 to 45 10 to 45
+12VDC +/-5% (amps typ) 0.9 0.9 1.5
Start-up current(Amps max) 2.2 2.2 4.0
+5VDC +/- 5% (Amps max) 0.8 0.8 1.5
Power (Watts typ) 14.8 14.8 25.5
Height Half? Half Full
Interface ST506/412 ST506/412 ST506/412
Encoding MFM MFM MFM
Basic Spec ST4038 ST251 ST4051
----------------------------- ------ ----- ------
Formatted Capacity 31.9 42.8 42.5
Read/Write heads 5 6 5
Data Cyls 733 820 977
Step pulse (usec) 10 to 70 3 to 200 10 to 70
Average access time (msec max) 40 40 40
Operating temp (C) 10 to 45 10 to 45 10 to 45
+12VDC +/-5% (amps typ) 1.5 0.5 1.5
Start-up current(Amps max) 4.0 2.0 4.0
+5VDC +/- 5% (Amps max) 1.5 1.0 1.5
Power (Watts typ) 25.5 11.0 25.5
Height Full Half Full
Interface ST506/412 ST506/412 ST506/412
Encoding MFM MFM MFM
Basic Spec ST4053 ST4096
----------------------------- ------ ------
Formatted Capacity 44.5 80.2
Read/Write heads 5 9
Data Cyls 1024 1024
Step pulse (usec) 3 to 70 3 to 70
Average access time (msec max) 28 28
Operating temp (C) 10 to 45 10 to 45
+12VDC +/-5% (amps typ) 1.5 1.5
Start-up current(Amps max) 4.0 4.0
+5VDC +/- 5% (Amps max) 1.5 1.5
Power (Watts typ) 25.5 25.5
Height Full Full
Interface ST506/412 ST506/412
Encoding MFM MFM
Basic Spec ST238R ST251R ST277R
----------------------------- ------ ------ ------
Formatted Capacity 31.5 43.6 65.5
Read/Write heads 4 4 6
Data Cyls 615 820 820
Step pulse (usec) 5 to 200 3 to 200 3 to 200
Average access time (msec max) 65 40 40
Operating temp (C) 15 to 45 15 to 45 15 to 45
+12VDC +/-5% (amps typ) 0.9 0.5 0.5
Start-up current(Amps max) 2.2 2.0 2.0
+5VDC +/- 5% (Amps max) 0.8 1.0 1.0
Power (Watts typ) 14.8 11.0 11.0
Height Half Half Half
Interface ST506/412 ST506/412 ST506/412
Encoding RLL RLL RLL
Basic Spec S4077R ST4144R
----------------------------- ------ -------
Formatted Capacity 68.2 122.7
Read/Write heads 5 9
Data Cyls 1024 1024
Step pulse (usec) 3 to 70 3 to 70
Average access time (msec max) 28 28
Operating temp (C) 15 to 45 15 to 45
+12VDC +/-5% (amps typ) 1.5 1.5
Start-up current(Amps max) 4.0 4.0
+5VDC +/- 5% (Amps max) 1.5 1.5
Power (Watts typ) 25.5 25.5
Height Full Full
Interface ST506/412 ST506/412
Encoding RLL RLL
Basic Spec ST225N ST251N ST277N
----------------------------- ------ ------ ------
Guaranteed Formatted Capacity 21.4 43.1 64.9
Read/Write heads 4 4 6
Average access time (msec max) 65 40 40
Operating temp (C) 10 to 45 10 to 45 10 to 45
+12VDC +/-5% (amps typ) 0.9 0.5 0.5
Start-up current(Amps max) 2.2 2.0 2.0
+5VDC +/- 5% (Amps max) 1.2 1.4 1.4
Power (Watts typ) 16.8 13.0 13.0
Height Half Half Half
Interface SCSI SCSI SCSI
Basic Spec ST4077N ST4096N ST4144N
----------------------------- ------- ------- -------
Guaranteed Formatted Capacity 67.6 83.9 122.1
Read/Write heads 5 4 9
Average access time (msec max) 28 17 28
Operating temp (C) 10 to 45 10 to 45 10 to 45
+12VDC +/-5% (amps typ) 1.5 1.5 1.5
Start-up current(Amps max) 4.0 4.0 4.0
+5VDC +/- 5% (Amps max) 1.5 1.5 1.5
Power (Watts typ) 25.5 25.5 25.5
Height Full Full Full
Interface SCSI SCSI SCSI
Basic Spec ST4192N
----------------------------- -------
Guaranteed Formated Capacity 168.5
Read/Write heads 8
Average access time (msec max) 17
Operating temp (C) 10 to 45
+12VDC +/-5% (amps typ) 1.5
Start-up current(Amps max) 4.0
+5VDC +/- 5% (Amps max) 1.5
Power (Watts typ) 25.5
Height FULL
Interface SCSI
I will gather some info about the drives used by DEC and add it here also.
Alan
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2419.1 | Some more Specs | DPDMAI::ANDERSONA | Sat May 20 1989 23:14 | 136 | |
Here is the final list of Drive Specs. Sorry it has been delayed
but things have been busy at the office.
This information has been gathered from a variety of sources. I have tried
to enter it as it was obtained. I do not take any responsibility for the
accuracy of the original record. This is intended to give you some idea
as to the capacity of that drive you found advertised in a magazine ad.
Keep your eye out there are good deals but it is definetly buyer beware.
Common DEC Drives
RD50 RD51 RD52 RD53
Formated Capacity 5 10 31 71
Unformated Capacity 6 12 42 85
Dirve Height Full Full Full Full
Average Access Time 178.3 93.3 57.3 38.3
Maximum Transfer Rate 625 625 625 625
Power Consumption (wat 29 29 35 36
Amps @ +5V 1 1 1 1
Amps @ +12V 1.9 1.9 2.5 2.5
Number of R/W Heads 4 4 8 8
Number of Cylinders 153 306 512 1024
Positioner Type Steper Stepper Embeded Dedicaded
Motor Motor Servo Servo
RD54 RD31 RD32
Formated Capacity 159 20 42
Unformated Capacity 191 25 51
Dirve Height Full Half Half
Average Access Time 38.3 73.3 48.3
Maximum Transfer Rate 625 625 625
Power Consumption (wat 24 16.3 13.2
Amps @ +5V 1.29 0.6 0.95
Amps @ +12V 1.34 1.1 0.65
Number of R/W Heads 15 4 6
Number of Cylinders 1224 615 777
Positioner Type Dedicated Stepper Stepper
Servo Servo Servo
RD50 = ST506 Segate
RD51 = ST412 Segate
RD52 = Quantum 540
RD53 = Micropolis 1325
RD54 = Maxtor XT2190
RD31 = ST225 Segate
RD32 = ST251 Segate
Early on we used a Segate (ST4038?) for the RD52 I am not sure about the
exact model it has been awhile since I have seen one.
Miniscribe drive Specs
3053 3085 3448 3438P
Formated Capacity 44.6 72.4 32.7 32.7
Number of Disk 3 5 2 2
Number of Heads 5 7 4 4
Number of Cylinders 1024 1177 615 615
Average Access(ms) 25 18 85 55
Trace to Track Access 5 5 15 15
Average Power 12.4 12.4 14.5 14.5
Form Factor HH HH HH HH
MTBF (Hrs) 30000 30000 20000 20000
Actuator type RVC RVC LRP LRP
Encoding Method MFM MFM RLL RLL
Sectors per Track 17 17 26 26
Auto Park YES YES NO NO
Operating temp 50-122 50-122 40-122 40-122
Media O O TF TF
Miniscribe drive
3650 3675 6085 6128
Formated Capacity 41.9 64.6 71.3 110.1
Number of Disk 3 3 5 5
Number of Heads 6 6 8 8
Number of Cylinders 809 809 1024 1024
Average Access(ms) 61 61 28 25
Trace to Track Access 15 15 6 6
Average Power 18.6 18.6 18 18
Form Factor HH HH FH FH
MTBF (Hrs) 20000 20000 25000 25000
Actuator type LRP LRP LVC LVC
Encoding Method MFM RLL MFM RLL
Sectors per Track 17 26 17 26
Auto Park NO NO YES YES
Operating temp 40-122 40-122 50-113 50-113
Media O P O P
Miniscribe drive
8425 8425F 8438 8438F 9380E
Formated Capacity 21.4 21.4 32.7 32.7 340.4
Number of Disk 2 2 2 2 8
Number of Heads 4 4 4 4 15
Number of Cylinders 615 615 615 615 1224
Average Access(ms) 68 40 68 40 16
Trace to Track Access 15 15 15 15 3
Average Power 9.9 12.5 9.9 12.5 22
Form Factor 3.5 3.5 3.5 3.5 FH
MTBF (Hrs) 20000 20000 20000 20000 30000
Actuator type LRP LRP LRP LRP RVC
Encoding Method MFM MFM RLL RLL RLL/ESDI
Sectors per Track 17 17 26 26 36
Auto Park N/A N/A N/A N/A YES
Operating temp 40-122 59-113 59-113 50-122 50-122
Media S/P S/P S/P S/P P
Segate Drive Specs
ST125 ST138 ST138R ST157R
Formated Capacity 21.4 32.1 32.7 49.1
Number of Disk 2 3 2 3
Number of Heads 4 6 4 6
Number of Cylinders 615 615 615 615
Average Access(ms) 30 30 30 30
Trace to Track Access 8 8 8 8
Average Power 10 10 10 10
Form Factor 3.5 3.5 3.5 3.5
MTBF (Hrs) 20000 20000 20000 20000
Actuator type HR HR HR HR
Encoding Method MFM MFM RLL RLL
Sectors per Track 17 17 26 26
Auto Park YES YES YES YES
Operating temp 50-113 50-113 580-113 50-113
Media S/TF S/TF S/TF S/TF
| |||||
| 2419.2 | Huh.? | WJG::GUINEAU | Tue May 23 1989 13:53 | 4 | |
Jeese, you left out all the new DEC RZxx drives :-) John | |||||
| 2419.3 | uh huh. | LOWLIF::DAVIS | That's not a BUG, it's a FEATURE! | Wed May 24 1989 00:37 | 5 |
>Jeese, you left out all the new DEC RZxx drives :-) Whoopty dooooo!!!!!!! ...richard | |||||