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T H I S I S A D O C U M E N T I N A S C I I - F O R M A T ! ! !
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2. Use a DOS-Editor like EDIT from original DOS-Version.
EDIT filename.txt
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T H I S I S A D O C U M E N T I N A S C I I - F O R M A T ! ! !
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******************************************************************************
P C - D I S K The Harddisk Information Database
DCI AG, Germany www.pc-disk.de
******************************************************************************
S T 2 5 1 R - 0 SEAGATE
NO MORE PRODUCED Native³ Translation
ÄÄÄÄÄÄÅÄÄÄÄÄÂÄÄÄÄÄÂÄÄÄÄÄ
Form 5.25"/HH Cylinders 820³ ³ ³
Capacity form/unform 62/ MB Heads 6³ ³ ³
Seek time í / track 40.0/ ms Sector/track 26³ ³ ³
Controller RLL / ST412 Precompensation 65535
Cache/Buffer KB Landing Zone 819
Data transfer rate 0.938 MB/S int Bytes/Sector 512
0.938 MB/S ext
Recording method RLL operating ³ non-operating
ÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄ
Supply voltage Temperature øC ö ³ ö
Power: sleep W Humidity % ö ³ ö
standby W Altitude km ö ³ ö
idle W Shock g ³
seek W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 70000
Warranty Month 12
Lift/Lock/Park YES Certificates
P C - D I S K The Harddisk Information Database
DCI AG, Germany www.pc-disk.de
**********************************************************************
J U M P E R S
**********************************************************************
SEAGATE ST213/ST225/ST225R/ST238R/ST250R PRODUCT MANUAL 36025-003
Jumper setting
--------------
Ü = Factory setting
JP7 Drive select Configuration Jumper block
----------------------------------------------
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄ¿
³Drive Select ³ 9-10 ³11-12 ³13-14 ³15-16 ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄ´
³Drive 4 ³CLOSED³OPEN ³OPEN ³OPEN ³
³Drive 3 ³OPEN ³CLOSED³OPEN ³OPEN ³
³Drive 2 ³OPEN ³OPEN ³CLOSED³OPEN ³
³Drive 1 ³OPEN ³OPEN ³OPEN ³CLOSED³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÙ
The Drive Select line enables the controller to select and adress
the drive. Control cable interface options may use either a daisy-
chain or radial configuration.
JP7 Manufacturing test
-----------------------
Ü 7- 8 OPEN Do not install a jumper on the Manufacturing Test
jumper on the user configuration jumper block.
This is a test function and used during the manu-
facturing process ans is not recommended for field
use. When the pins are shorted, the stepper motor
will continuously seek between Track 0 and the
maximum cylinder and will ignore control signals
via the interface.
JP7 Write Fault
----------------
Ü 5- 6 OPEN The Write Fault signal may be internally latched.
It may be enabled by shorting pins 5-6 at J7. This
latch may be cleared when Drive Select goes false
(if selected). The standard configuration, with
the shorting block removed, causes Write Fault to
go false when Write Gate goes false.
Not required for standard operation.
JP7 Recovery Mode
-----------------
Ü 3- 4 CLOSE Recovery Mode is a read/write head microstepping
option on the ST225R and ST250R. It is enabled by
shorting pins 3-4 at J7. THE ST225R AND ST250R ARE
SHIPPED WITH THIS OPTION ENABLED.
Recovery Mode is initiated when the controller asserts the Recovery
Mode line true at the interface. This changes the step line to a
microstep function after 100 nsec. A step pulse will now cause Seek
Complete to go false 100 nsec. after the drive receives the pulse.
The drive then microsteps off-track using the optimum algorithm,
allowing time for the read/write heads to settle and then takes the
Seek Complete line true.
The controller may then read data. If data is not read correctly, the
controller may issue an additional step pulse. Up to 2 microstep
algorithms may be accessed before the sequence is repeated.
When data is read correctly, the controller exits Recovery Mode by
taking the Recovery Mode line false at the interface. The drive will
then return the heads to the nominal position by taking Seek Complete
false, allowing time for the heads to settle, and resasserting Seek
Complete.
JP7 Radial/Daisy-Chain Mode
----------------------------
Ü 1- 2 OPEN Daisy-Chain-Configuration
A Daisy-Chain configuration allows connection of
a maximum of two drives on a common control cable.
A separate data cable is required for each drive.
The last drive in the chain (physically farthest
from the controller) requires termination. All
other drives should not be terminated. The maxi-
mum permitted cable length from the controller to
the last drive is 10ft (0.31m).
1- 2 CLOSE Radial Configuration
To configure the drive radially, install a jumper
on pins 1 and 2 of the user configuration jumper
block. If you configure the drive radially, leave
the resistor terminator packs installed on all
drives. Each radially connected drive has its own
control and data cable. Drives in this configu-
ration always remain selected.
J3 DC Power and pin connector assignments
------------------------------------------
ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿ pin 1 +12 VDC
³ 1 2 3 4 ³ pin 2 +12 VDC Gnd
ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ pin 3 + 5 VDC Gnd
pin 4 + 5 VDC
P C - D I S K The Harddisk Information Database
DCI AG, Germany www.pc-disk.de
**********************************************************************
G E N E R A L
**********************************************************************
SEAGATE ST412 MFM/RLL
ST412 Interface (MFM and RLL)
===================================================================
ST412 Interface (MFM and RLL) ST-506 was predecessor without buffered
seek
2 Cables: 1 each 34-pin Command Cable and 1 each 20-pin Data Cable
-------------------------------------------------------------------
Command Cable Description
J1 (34-pin Command) Host/Drive Pin Assignments
GROUND RTN SIGNAL PIN SIGNAL
PIN
_____________________________________________________
3
1 2 -HEAD SELECT 2
2
3 4 -HEAD SELECT 2
5 6 -WRITE GATE
7 8* -SEEK COMPLETE
9 10* -TRACK 0
11 12* -WRITE FAULT
0
13 14 -HEAD SELECT 2
15 16 -RESERVED
1
17 18 -HEAD SELECT 2
19 20* -INDEX
21 22* -READY
23 24 -STEP
25 (29)** 26 (28) -DRIVE SELECT 1 (2)
27 (27) 28 (26) -DRIVE SELECT 2 (1)
29 (25) 30 -DRIVE SELECT 3
31 32 -DRIVE SELECT 4
33 34 -DIRECTION IN
* STATUS ENABLED WITH DRIVE SELECT
** TWISTED CABLE IN PARENTHESES
J2 (20-pin Data) HOST/DRIVE PIN ASSIGNMENTS
GROUND RTN SIGNAL PIN SIGNAL NAME
PIN
_____________________________________________________________
2 1 -DRIVE SELECTED
4 3 RESERVED
6 5 RESERVED
8 7 RESERVED
10 9 RESERVED
12 11 GROUND
13 +MFM (RLL) WRITE DATA
14 -MFM (RLL) WRITE DATA
16 15 GROUND
17 +MFM (RLL) READ DATA
18 -MFM (RLL) READ DATA
20 19 GROUND
Seagate Technology Desk Reference July 17 2000