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Conference hydra::amiga_v1

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

2419.0. "Hard Disk Info" by DPDMAI::ANDERSONA () Sun Apr 02 1989 03:38

   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.RTitleUserPersonal
Name
DateLines
2419.1Some more SpecsDPDMAI::ANDERSONASun May 21 1989 02:14136
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



2419.2Huh.?WJG::GUINEAUTue May 23 1989 16:534
Jeese, you left out all the new DEC RZxx drives  :-)

John
2419.3uh huh.LOWLIF::DAVISThat's not a BUG, it's a FEATURE!Wed May 24 1989 03:375
>Jeese, you left out all the new DEC RZxx drives  :-)

Whoopty dooooo!!!!!!!

...richard