Single-ended 8-bit SCSI Pinouts

SIGNAL	DD-50P	HD-50	DD-50SA	HD-68		SIGNAL	DD-50P	HD-50	DD-50SA	HD-68
-DB(0)	2	26	34	40		GND	1	1	1	6
-DB(1)	4	27	2	41		GND	3	2	18	7
-DB(2)	6	28	19	42		GND	5	3	35	8
-DB(3)	8	29	36	43		GND	7	4	3	9
-DB(4)	10	30	4	44		GND	9	5	20	10
-DB(5)	12	31	21	45		GND	11	6	37	11
-DB(6)	14	32	38	46		GND	13	7	5	12
-DB(7)	16	33	6	47		GND	15	8	22	13
-DB(P)	18	34	23	48		GND	17	9	39	14
GND	20	35	40	49		GND	19	10	7	15
GND	22	36	8	50		GND	21	11	24	16
GND	24	37 Res	25	51 Opn		GND	23	12 Res	41	17 Opn
TPWR	26	38	42	52		GND	25	13 Opn	9	18 Opn
GND	28	39 Res	10	53		GND	27	14 Res	26	19
GND	30	40	27	54		GND	29	15	43	20
-ATN	32	41	44	55		GND	31	16	11	21
GND	34	42	12	56		GND	33	17	28	22
BSY	36	43	29	57		GND	35	18	45	23
-ACK	38	44	46	58		GND	37	19	13	24
-RST	40	45	14	59		GND	39	20	30	25
-MSG	42	46	31	60		GND	41	21	47	26
-SEL	44	47	48	61		GND	43	22	15	27
-C/D	46	48	16	62		GND	45	23	32	28
-REQ	48	49	33	63		GND	47	24	49	29
-I/O	50	50	50	64		GND	49	25	17	30

Connector Types

DD-50P		HD-50		DD-50SA

Notes

1. On HD50 cables, Pins 12, 14, 37, and 39 are reserved and Pin 13 is open.
2. On HD50 to HD68 cables, Pins 1, 2, 3, 4, 5, 17, 18, 31, 32, 33, 34, 35, 36, 37, 38, 39, 51, 65, 66, 67, and 68 are open.

* 50-Pin Connector Pins 17 and 51 are not used on the Differential SCSI Tray Internal Cable 530-1904-xx.

* Pins 17 and 51 are used on the Differential SCSI Tray Internal Cable 530-2096-xx.

The FORMAT UNIT command formats the media so that all data blocks can be accessed. The following lists are used during the defect management process.

Primary, or Manufacturer's, Defect List (P list)

The P list supplied by the manufacturer is resident on the disk drive. The initiator can reference this list with the READ DEFECT DATA command. The initiator cannot change or erase the Primary list.

Certification Defect List (C list)

The C list is the position information of defective data blocks detected during data block verification after initialization when the FORMAT UNIT command is issued. These defects are added to the Grown list.

Data Defect List (D list)

The D list is the defect position information transferred from the initiator upon execution of the FORMAT UNIT command. These defects are added to the Grown list.

Grown Defect List (G list)

The G list includes defects identified to, or by, the drive. It does not include the P list. These defects are classified as flaws appearing after the media is formatted. The initiator may request that the current G list be used during formatting, or that the current G list be erased and a new list begun. Entries to the G list include:

1. Defects provided to the drive in D lists during previous FORMAT UNIT commands.
2. Drive C list defects detected during previous FORMAT UNIT commands.
3. Defects appended by successful completion of the REASSIGN BLOCKS command.

SCSI Option Bit Setting

Use the following procedure to determine the SCSI option bit setting under Solaris 2.x:

# adb -k /kernel/unix /dev/mem (Solaris 2.0 - 2.4)

# adb -k /dev/ksyms /dev/mem (Solaris 2.5)

scsi_options/X

$q

SCSI Option Bits

Disconnect/Reconnect	0x008
Linked Commands	0x010
Synchronous Transfer	0x020
Parity	0x040
Tagged Queuing	0x080
Fast SCSI	0x100
Wide SCSI	0x200
Ultra SCSI	0x400

Tagged Queuing

Tagged Queuing allows a disk to receive more than one command at a time and to perform the commands in an order that reduces disk latency in many applications. Tagged Queuing is implemented in Solaris 2.1.

Some SCSI disk drives may not properly implement Tagged Queuing. Disable Tagged Queuing in the driver to prevent unrecoverable failures. Add the following to the /etc/system file under Solaris 2.x:

set scsi_options=0x178

Wide SCSI

To enable Wide SCSI under Solaris 2.3, add the following to the /etc/system file:

set scsi_options=0x3f8

SCSI Controllers

esp						isp	fas	glm
53C90	53C90A	ESP236 53C96	FAS101	FAS236	MACIO	ISP1000 ISP1000U* ISP1040	FEPS	53C875 53C876*
4/20 4/25 4/40 4/60 4/65	4/75 4/40 4/50 X1055	SBE/S SS600	SS10 SS600	SS1000 FSBE/S DSBE/S	4/15 4/30 SS5 SS10SX SS20 A11	SWIS/S DWIS/S UDWIS/S* X1032 X2630	A12 A14 X1018 X1059 X2610 X2620	RSM2000 A16 A20/A25 A23* A26* A27* X6540* X6541*

MACIO (NCR 59C100) (STP2000)

The MACIO ASIC provides three special purpose SBus DMA channels: Ethernet, SCSI, and Parallel Port. The SCSI block is based on the Emulex FAS101 macrocell which is a superset of (and backwards compatible with) the ESP100A.

FEPS (STP2002)

The FEPS ASIC is a Fast Ethernet, Parallel Port, and Fast Wide SCSI controller. The SCSI Channel consists of SCSI DVMA and FAS366.

ESP esp(7D)

The esp driver supports the Emulex family of esp SCSI chips (esp100, esp100A, esp236, fas101, fas236).

FAS fas(7D)

The fas driver supports the Qlogic FAS366 SCSI chip.

ISP (isp7D)

The isp driver supports the Qlogic ISP1000 SCSI chip on SBus and the ISP1040B SCSI chip on PCI bus.

GLM (glm7D)

The glm driver supports the Symbios 53c875 SCSI chip.