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3.2.2.1

PIO and DMA Data-Transfer Modes

You can set the multiword DMA mode and identify the PIO data-transfer
mechanism and transfer mode with the Set Features command. To set
the multiword DMA mode:

1.

1. Write Set Features command value 03

H

(Set Data Transfer mode) to

the Features register.

2. Write a transfer types value to the Sector Count register. The upper 5

bits of this value define the type of data transfer, and the lower 3 bits
encode the mode value. This changes word 63 of the Identify Drive
command to the value you enter in the Sector Count register.

The following table identifies allowable transfer types values:

Data-Transfer Mechanism

Transfer Types value

Mechanism name

Mode

value

Data

Upper 5 bits

Lower 3 bits

PIO Transfer Mode (default)

2

00000

000

PIO Transfer Mode: Disable
IORDY Set PIO Mode = 2

2

00000

001

PIO Flow Control Transfer
Mode: Set PIO Mode = 0

0

00001

000

PIO Flow Control Transfer
Mode: Set PIO Mode = 1

1

00001

001

PIO Flow Control Transfer
Mode: Set PIO Mode = 2

2

00001

010

PIO Flow Control Transfer
Mode: Set PIO Mode = 3

3

00001

011

PIO Flow Control Transfer
Mode: Set PIO Mode = 4)

4

00001

100

Obsolete

00010

nnn

Multiword DMA Mode

0

00100

000

Multiword DMA Mode

1

00100

001

Multiword DMA Mode

2

00100

010

Synchronous DMA Mode

01000

nnn

Reserved

—

10000

nnn

Note. If the drive does not support a commanded mode, it returns a 04

aborted command error.

Medalist Pro 6450/6451 Product Manual, Rev. B

33

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Содержание ST36450A

Страница 1: ... Medalist Pro Family Medalist Pro 6450 ST36450A Medalist Pro 6451 ST36451A ATA Interface Drives Product Manual ...

Страница 2: ......

Страница 3: ... Medalist Family Medalist Pro 6450 ST36450A Medalist Pro 6451 ST36451A ATA Interface Drives Product Manual ...

Страница 4: ...nd the Medalist logo are registered trademarks of Seagate Technology Inc Other product names are trademarks or registered trademarks of their owners Seagate reserves the right to change without notice product offerings or specifications No part of this publication may be reproduced in any form without written permission from Seagate Technology Inc ...

Страница 5: ...own sequence 8 1 9 Power up sequence 9 1 9 1 Power down sequence 9 1 10 Auto park 9 1 11 Power specifications 9 1 11 1 Power management 9 1 11 2 Power consumption 11 1 12 Input noise 11 1 13 Environmental specifications 11 1 13 1 Ambient temperature 11 1 13 2 Temperature gradient 12 1 13 3 Altitude 12 1 13 4 Relative humidity 12 1 14 Shock and vibration 12 1 15 Acoustics 13 1 16 Reliability 13 1 1...

Страница 6: ... 4 4 Remote LED connection 21 2 5 Mounting the drive 22 3 0 ATA interface 25 3 1 ATA Interface connector pin assignments 25 3 2 Command set 27 3 2 1 Identify drive command ECH 29 3 2 2 Set Features command EFH 32 3 2 3 Standby timer timeout period 34 3 2 4 Sleep command 99H E6H 34 3 2 5 Automatic Reallocation 34 3 3 Synchronous DMA Transfer 35 3 3 1 Signal Line Definitions 35 3 3 2 Protocol Rules ...

Страница 7: ...Figure 5 Connecting cable selected drives 22 Figure 6 Mounting dimensions 23 Figure 7 ATA interface connector pin assignments 26 Figure 8 Programmed I O timing without IORDY 37 Figure 9 Programmed I O timing with IORDY 38 Figure 10 Multiword DMA timing 39 Figure 11 Sustained synchronous DMA burst 40 Medalist Pro 6450 6451 Product Manual Rev B v ...

Страница 8: ...vi Medalist Pro 6450 6451 Product Manual Rev B ...

Страница 9: ...e 2 transfer modes and multiple block read write The multiple block read write feature allows the drives to store several blocks of data in cache and to transfer them in a single burst These drives use a 512 Kbyte segmented cache Segmenting the cache provides a designated area where blocks of contiguous read or write data can be staged for transfer in a single burst The ST36450A and ST36451A drive...

Страница 10: ...er barrier limited by some system BIOSs Available software driver that provides expanded 32 bit disk access support for Windows 3 x Performance Fast ATA 2 ST36450A burst transfer rates up to 16 6 Mbytes per second Ultra ATA ST36451A burst transfer rates up to 13 3 Mbytes per second Supports DMA mode 2 PIO mode 4 and multiple block read write 512 Kbyte segmented buffer 12 msec average read seek tim...

Страница 11: ...al read write heads 10 10 Physical discs 5 5 Areal density Mbits per square inch 928 8 928 8 Data zones 19 19 Recording density bits per inch 138 011 138 011 Track density tracks per inch 6 730 6 730 Spindle speed RPM 5 397 5 397 Track to track seek time msec typical 2 0 2 0 Average read seek time msec typical 9 5 9 5 Average write seek time msec typical 10 0 10 0 Full stroke seek time msec typica...

Страница 12: ...ax 3 0A 3 0A Seek power typical 9 8W 9 8W Read Write power and current typical 7 8W 7 8W Idle total power typical 7 8W 7 8W Standby Sleep total power typical 2 0W 2 0W Voltage tolerance including noise 5V 5 5 Voltage tolerance including noise 12V 5 5 Operating temperature C 5 to 55 C 5 to 55 C continued from previous page 4 Medalist Pro 6450 6451 Product Manual Rev B ...

Страница 13: ...te multiple partitions to access the drive s full capacity 2 One Mbyte equals one million bytes 3 If the system BIOS does not support more than 4 096 cylinders it can cause the computer to hang during startup or it can truncate or wrap the cylinders To resolve this issue the system BIOS needs to be modified the cylinder register or variable must be increased from 12 bits to 16 bits to accommodate ...

Страница 14: ...transfer rate Mbits per sec 63 to 116 63 to 116 Spindle speed RPM 5 397 0 5 5 397 0 5 Cache size Kbytes 512 512 Logical cylinders 13 328 13 328 Physical cylinders 6 536 6 536 Bytes per sector 512 512 Areal density Mbytes sq in 928 8 928 8 Data zones 19 19 Recording density max BPI 138 011 138 011 Track density TPI 6 730 6 730 Note See Figure 8 on page 37 and Figure 9 on page 38 for PIO timing spec...

Страница 15: ...en random cylinders Full stroke seek time is half the time needed to seek from track 0 to the maximum track and back to track 0 Track to track seek time typ Average typical seek time Full stroke seek time typ Average latency 2 0 msec seek 2 5 msec read 3 5 msec write 9 5 msec read 10 0 msec write 20 0 msec seek 22 0 msec read 23 5 msec write 5 58 msec Note Host overhead varies between systems and ...

Страница 16: ...p times Within 20 seconds after power is applied the drive is ready Within 15 seconds after power is removed the drive spindle stops rotating 1 8 Typical power up and power down sequence This section describes typical power up and power down sequences to assist you in evaluating the drive s performance They are not perform ance specifications A typical startup current profile is shown in Figure 1 ...

Страница 17: ...maximum data cylinder 4 The magnetic actuator lock mechanism locks the arm This completes the power down sequence 1 10 Auto park During power down the read write heads automatically move to the landing zone The heads park inside the maximum data cylinder and the magnetic actuator lock engages When power is applied the heads recalibrate to track 0 1 11 Power specifications 1 11 1 Power management T...

Страница 18: ...volution 22 2 msec dwell between Seek commands Read write Read write mode is entered from Idle mode Read write electronics are activated and the servo is on track The drive reads from or writes to the disc 1 11 1 2 Idle mode The Idle mode is entered 1 minute after the last disc I O activity The motor is up to speed and the actuator is repositioned once every minute This mode uses an algorithm that...

Страница 19: ...5 Watts typ 1 8 1 8 1 8 1 75 Power Total watts typ 9 8W 7 8W 7 8W 2 0W 1 12 Input noise 5V 12V Voltage tolerance including noise 5 5 Input noise frequency max 25 MHz 25 MHz Input noise max peak to peak 100 mV 240 mV 1 13 Environmental specifications 1 13 1 Ambient temperature Operating 5 to 55 C 41 to 122 F Nonoperating 40 to 70 C 40 to 158 F Note The system must provide sufficient airflow to main...

Страница 20: ...mounting screws Shock measurements are based on an 11 msec half sine wave shock pulse not to be repeated more than twice per second During normal operating shock and vibration there is no physical dam age to the drive or performance degradation During nonoperating shock and vibration the read write heads are positioned in the landing zone During abnormal operating shock and vibration there is no p...

Страница 21: ...liability Read error rates are measured with automatic retries and data correction with ECC enabled and all flaws reallocated The mean time between failures MTBF is measured at nominal power at sea level and an ambient temperature of 25 C Nonrecoverable read errors 1 per 1013 bits transferred Seek errors 1 per 107 physical seeks Contact start stops 30 000 cycles MTBF 300 000 power on hours Service...

Страница 22: ...le etc and that a terminator should be used on all unused I O ports 1 19 FCC verification The Medalist Pro ATAinterface drives are intended to be contained solely within a personal computer or similar enclosure not attached to an external device As such a drive is considered to be a subassembly even when individually marketed to the customer As a subassembly no Federal Communications Commission au...

Страница 23: ...on technician for additional suggestions You may find helpful the following booklet prepared by the Federal Communications Commission How to Identify and Resolve Radio Television Interference Problems This booklet is available from the Superintendent of Documents US Government Printing Office Washington DC 20402 Refer to publication number 004 000 00345 4 Note This digital apparatus does not excee...

Страница 24: ...gung an der Unterseite nicht mehr als 5 08 mm betragen 3 Als Versorgungsspannugen werden benötigt 5V æ 5 0 55A 12Væ 5 0 35A 2 0A fur ca 30 Sek fur 10 4 Die Versorgungsspannung muss SELV entsprechen 5 Alle Arbeiten an der Festplatte dürfen nur von ausgebildetem Serv icepersonal durchgeführt werden Bitte entfernen Sie nicht die Auf schriftenschilder des Laufwerkes 6 Der Einbau des Laufwerkes muss de...

Страница 25: ... wrist strap or ground yourself frequently by touching the metal chassis of a computer that is plugged into a grounded outlet Wear a grounded wrist strap throughout the entire installation procedure Handle the drive by its edges or frame only The drive is extremely fragile handle it with care Do not press down on the drive top cover Always rest the drive on a padded antistatic surface until you mo...

Страница 26: ... 3M 3448 2040 Flat cable AWG28 stranded 3M 3365 40 To ensure the integrity of your data use a 40 connector nonshielded I O cable with a maximum length of 18 inches 46 centimeters 2 3 Power connector The drive uses a standard 4 pin male power connector We recommend the following part number or their equivalents for the mating connector Part Description Part number Connector Housing AMP 1 480424 0 C...

Страница 27: ...r single drive operation Configure the drive as the master with an ATA compatible slave Configure the drive as the slave Configure the drive for alternate capacity Configure the drive for cable select Install a remote LED The jumper settings for these options are shown in Figure 4 on page 20 The drive is shipped with a spare jumper attached to pins 6 and 8 Use this jumper to configure the drive Ci...

Страница 28: ...e jumper on pins 6 and 8 does not affect drive operation Drive as slave Place a jumper on pins 5 and 6 Drive as master with an ATA compatible slave Place a jumper on pins 7 and 8 Options jumper block J5 Circuit Board 2 6 8 4 1 7 5 3 Remote LED connection One drive only Drive is slave Cable select Spare Jumper Master with an ATA compatible slave Alternate Capacity AC Figure 4 Configuration Settings...

Страница 29: ...d by their physical position on the cable The drive plugged into the I O connector that carries the CSEL signal is the master The drive plugged into the I O connector that does not carry the CSEL signal is the slave To configure the drives for computers that use cable select Install jumpers on pins 5 and 6 and pins 7 and 8 as shown in Figure 4 on page 20 Connect the drives to the cable as shown in...

Страница 30: ...e bottom mounting screws more than 0 20 inches 6 turns into the drive frame Side mounting holes Use four 6 32 UNC screws in four of the six available side mounting holes as shown in Figure 6 Use two mounting holes on each side of the drive Caution Do not insert the side mounting screws more than 0 20 inches 6 turns into the drive frame If you use a screw that is too long you risk damaging the driv...

Страница 31: ...ax screw length into side of drive 0 15 in 3 81 mm Screw tightening torque 6 0 in lb 0 675 NM max with minimum thread engagement of 0 12 in 3 05 mm Mounting holes four on bottom 6 32 UNC Max screw length into bottom of drive 0 15 in 3 81 mm Screw tightening torque 6 0 in lb 0 675 NM max with minimum thread engagement of 0 12 in 3 05 mm Power and interface connectors can extend past the A dimension...

Страница 32: ...24 Medalist Pro 6450 6451 Product Manual Rev B ...

Страница 33: ...interface protocol The drivers can sink up to 24 mA and drive a load up to 300 pF The integrity of the ATA interface is affected by the interface cable It is designed to support a 40 conductor nonshielded interface cable with a maximum length of 18 inches 46 centimeters 3 1 ATA Interface connector pin assignments The signal name and signal direction for each I O connector pin is shown in Figure 7 ...

Страница 34: ...t 10 Host Data Bus Bit 4 Host Data Bus Bit 11 Host Data Bus Bit 3 Host Data Bus Bit 12 Host Data Bus Bit 2 Host Data Bus Bit 13 Host Data Bus Bit 1 Host Data Bus Bit 14 Host Data Bus Bit 0 Host Data Bus Bit 15 Ground No Pin DMA Request Ground Host I O Write Ground Host I O Read Ground I O Channel Ready Cable Select DMA Acknowledge Ground Host Interrupt Request Host 16 Bit I O Host Address Bus Bit ...

Страница 35: ...e used FR Features register SC Sector Count register SN Sector Number register CY Cylinder register DH Drive Head register n This register does not contain a valid parameter for this command y This register contains a valid parameter for this command In the Drive Head register both the drive and head parameters are valid for this command D The Drive Head register contains a valid drive parameter f...

Страница 36: ...y y y Read Sector 20 21 n y y y y Read Sector Buffer E4 n n n n D Read Verify Sector 40 41 n y y y y Recalibrate 1X n n n n D Seek 7X n n y y y Set Features EF y n n n D Set Multiple Mode C6 n y n n D Sleep 99 E6 n n n n D Standby 96 E2 n n n n D Standby Immediate 94 E0 n n n n D Write DMA CA CB y y y y Write Long 32 33 n y y y y Write Multiple C5 n y y y y Write Sector 30 31 n y y y y Write Secto...

Страница 37: ...logical heads 15 4 Vendor specific 34 540 5 Vendor specific 580 6 Number of logical sectors per track 63 7 9 Vendor specific 0000 10 19 Serial number 20 ASCII characters drive unique 20 Vendor specific 3 21 Vendor specific 896 22 ECC bytes R W Long 0004H 23 26 Firmware revision 8 ASCII characters drive unique 27 46 Model number 40 ASCII characters ST36450A ST36451A 47 Vendor specific 8010H 48 Rese...

Страница 38: ...hat can be transferred per interrupt on Read Write Multiple command 0000s 60 61 Total number of user addressable LBA sectors ST36450A 12 594 960 ST36451A 12 594 960 62 Obsolete 0000 63 Multiword DMA transfer mode active 0107H Mode 0 is active Modes 0 1 and 2 supported 64 Advanced PIO transfer mode supported 0003H Modes 3 and 4 supported 65 Minimum multiword DMA transfer cycle time per word 120 nse...

Страница 39: ... 0000 82 Command set support ST36450A 0000 ST36451A 7069H 83 Command set support ST36450A 0000 ST36451A 4000H 84 Command set feature supported extension 0 85 86 Command set feature enabled 0 87 Command set feature default 0 88 Ultra DMA mode ST36450A 0000 ST36451A 0007H 89 127 Reserved 128 Security status 0000 129 159 Vendor specific 160 255 Reserved Medalist Pro 6450 6451 Product Manual Rev B 31 ...

Страница 40: ... Write the Set Features command to the command register Note If the value in the Features register is not supported or is invalid the drives post an Aborted Command error At power on or after a hard reset the feature selections are restored to the factory default values The table below shows alterable features that the drives support Values that are preset at the factory are indicated as default i...

Страница 41: ...fer types values Data Transfer Mechanism Transfer Types value Mechanism name Mode value Data Upper 5 bits Lower 3 bits PIO Transfer Mode default 2 00000 000 PIO Transfer Mode Disable IORDY Set PIO Mode 2 2 00000 001 PIO Flow Control Transfer Mode Set PIO Mode 0 0 00001 000 PIO Flow Control Transfer Mode Set PIO Mode 1 1 00001 001 PIO Flow Control Transfer Mode Set PIO Mode 2 2 00001 010 PIO Flow C...

Страница 42: ... hours 254 FEH Reserved 255 FFH 21 minutes 15 seconds The drives are shipped with the Standby timer disabled 3 2 4 Sleep command 99H E6H This command performs the same function as the Standby Immediate command 94H E0H 3 2 5 Automatic Reallocation This feature allows the drive to identify grown media defects and to reallocate the sector without host intervention using both Read and Write Automatic ...

Страница 43: ...es revert back to their original definitions upon the de assertions of DMACK at the termination of the DMA burst Signal Line Definitions New Definitions Old Definitions DMARQ DMARQ DMACK DMACK DMACK IORDY on write commands DIOR on read commands STROBE DIOR on write commands IORDY on read commands STOP DIOW Note DMARQ and DMACK signal lines remain unchanged This en sures backward compatibility with...

Страница 44: ...chronous DMA transfer The correct re sponse for this error is to retry the complete command ABRT bit 2 is also set to ensure compatibility with drivers designed for previous versions of the Synchronous DMA Transfer Protocol Specification ABRT Aborted Command indicates that the requested command was aborted because the command code or a command parameter was invalid or some other error occurred The...

Страница 45: ...OW or DIOR pulse width 80 nsec T3 DIOW data setup 30 nsec T4 DIOW data hold 15 nsec T5 DIOR data setup 20 nsec T6 DIOR data hold 5 nsec T7 DIOW or DIOR to address valid hold 40 nsec T8 DIOW false to write data hold 30 nsec T9 DIOR false to read data hold 10 nsec Address valid DIOR and DIOW Write data valid Read data valid IOCS16 T7 T1 T2 T3 T5 T6 T4 T0 T9 T8 Figure 8 Programmed I O timing without ...

Страница 46: ...DIOR pulse width 8 bit 70 nsec DIOW or DIOR pulse width 16 bit 70 nsec T5 IORDY pulse width 1 250 nsec T6 DIOW data setup 20 nsec T7 DIOR data setup 20 nsec T8 DIOR data hold 5 nsec T9 DIOW data hold 10 nsec T10 DIOW or DIOR to address valid hold 5 nsec T11 Address valid until IOCS16 is negated 25 nsec Address valid DIOR or DIOW Write data valid Read data valid IOCS16 T1 T0 T2 T4 T6 T7 T9 T8 T11 T...

Страница 47: ... data setup 20 nsec TH DIOW data hold 10 nsec TI DMACK to DIOR or DIOW setup 0 nsec TJ DIOR or DIOW to DMACK hold 5 nsec TKR DIOR negated pulse width 25 nsec TKW DIOW negated pulse width 25 nsec TLR DIOR to DMARQ delay 35 nsec TLW DIOW to DMARQ delay 25 nsec DMACK DMARQ T0 DIOR or DIOW Read data valid Write data valid TK TG TD TI TJ TH TF TL TE Figure 10 Multiword DMA timing Medalist Pro 6450 6451...

Страница 48: ...nsec 10 nsec 7 nsec Tdh Data hold time at receiver 5 nsec 5 nsec 5 nsec Tdvs Data valid setup time at sender 70 nsec 48 nsec 34 nsec Tdvh Data valid hold time at sender 6 nsec 6 nsec 6 nsec Note Mode values show the minimum time only Tds Tdh Tdh Strobe at Sender T2cyc Tcyc Tcyc Tdvh Tdvs Tdvs T2cyc Data at Sender Strobe at Receiver Data at Receiver Tdvh Tdvh Tdh Tds Figure 11 Sustained Synchronous...

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Страница 52: ...Seagate Technology Inc 920 Disc Drive Scotts Valley California 95066 USA Publication Number 32652 001 Rev B Printed in USA ...

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