Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition

SCSI Disk Troubleshooting

SCSI Frequently Asked Questions (FAQ) List

Single-ended 8-bit SCSI Pinouts
Single-ended 16-bit SCSI Pinouts
Single Connector SCSI Pinouts
Differential 8-bit SCSI Pinouts
Differential 16-bit SCSI Pinouts
SCSI Sense Keys
SCSI Sense Codes

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

On HD50 cables, Pins 12, 14, 37, and 39 are reserved and Pin 13 is open.
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.

Single-ended 16-bit SCSI Pinouts

SIGNAL	PIN	SIGNAL	PIN
GND	1	-DB(12)	35
GND	2	-DB(13)	36
GND	3	-DB(14	37
GND	4	-DB(15)	38
GND	5	-DB(P1)	39
GND	6	-DB(0)	40
GND	7	-DB(1)	41
GND	8	-DB(2)	42
GND	9	-DB(3)	43
GND	10	-DB(4)	44
GND	11	-DB(5)	45
GND	12	-DB(6)	46
GND	13	-DB(7)	47
GND	14	-DB(P)	48
GND	15	GND	49
GND	16	GND	50
TERMPWR	17	TERMPWR	51
TERMPWR	18	TERMPWR	52
open	19	open	53
GND	20	GND	54
GND	21	-ATN	55
GND	22	-GND	56
GND	23	-BSY	57
GND	24	-ACK	58
GND	25	-RST	59
GND	26	-MSG	60
GND	27	-SEL	61
GND	28	-C/D	62
GND	29	-REQ	63
GND	30	-I/O	64
GND	31	-DB(8)	65
GND	32	-DB(9)	66
GND	33	-DB(10)	67
GND	34	-DB(11)	68

Connector Type

Single Connector SCSI Pinouts

PIN	DESCRIPTION	PIN	DESCRIPTION	PIN	DESCRIPTION	PIN	DESCRIPTION
1	+12v	21	-DB(7)	41	+12v Ground	61	Ground
2	+12v	22	-DB(6)	42	+12v Ground	62	Ground
3	+12v	23	-DB(5)	43	+12v Ground	63	Ground
4	+12v	24	-DB(4)	44	+12v Ground	64	Ground
5	Reserved / NC	25	-DB(3)	45	Reserved N/C	65	Ground
6	Reserved / NC	26	-DB(2)	46	Reserved N/C	66	Ground
7	-DB(11)	27	-DB(1)	47	Ground	67	Ground
8	-DB(10)	28	-DB(0)	48	Ground	68	Ground
9	-DB(9)	29	-DB(P1)	49	Ground	69	Ground
10	-DB(8)	30	-DB(15)	50	Ground	70	Ground
11	-I/O	31	-DB(14)	51	Ground	71	Ground
12	-REQ	32	-DB(13)	52	Ground	72	Ground
13	-C/D	33	-DB(12)	53	Ground	73	Ground
14	-SEL	34	+5v	54	Ground	74	+5v Ground
15	-MSG	35	+5v	55	Ground	75	+5v Ground
16	-RST	36	+5v	56	Ground	76	+5v Ground
17	-ACK	37	SYNC	57	Ground	77	LED
18	-BSY	38	RMT_START	58	Ground	78	DLYD_START
19	-ATN	39	SCSI ID (0)	59	Ground	79	SCSI ID (1)
20	-DB(P0)	40	SCSI ID (2)	60	Ground	80	SCSI ID (3)

Differential 8-bit SCSI Pinouts

SIGNAL NAME	50 PIN	68 PIN	SIGNAL NAME	50 PIN	68 PIN
None	-	1	None	-	35
None	-	2	None	-	36
None	-	3	None	-	37
None	-	4	None	-	38
None	-	5	None	-	39
GND	1	6	GND	2	40
+DB(0)	3	7	-DB(0)	4	41
+DB(1)	5	8	-DB(2)	6	42
+DB(2)	7	9	-DB(2)	8	43
+DB(3)	9	10	-DB(3)	10	44
+DB(4)	11	11	-DB(4)	12	45
+DB(5)	13	12	-DB(5)	14	46
+DB(6)	15	13	-DB(6)	16	47
+DB(7)	17	14	-DB(7)	18	48
+DB(P)	19	15	-DB(P)	20	49
DIFFSENS	21	16	GND	22	50
TERMPWR	23	17*	TERMPWR	24	51*
TERMPWR	25	18	TERMPWR	26	52
GND	27	19	GND	28	53
+ATN	29	20	-ATN	30	54
GND	31	21	GND	32	55
+BSY	33	22	-BSY	34	56
+ACK	35	23	-ACK	36	57
+RST	37	24	-RST	38	58
+MSG	39	25	-MSG	40	59
+SEL	41	26	-SEL	42	60
+C/D	43	27	-C/D	44	61
+REQ	45	28	-REQ	46	62
+I/O	47	29	-I/O	48	63
GND	49	30	GND	50	64
None	-	31	None	-	65
None	-	32	None	-	66
None	-	33	None	-	67
None	-	34	None	-	68

Connector Types

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

Differential 16-bit SCSI Pinouts

SIGNAL	PIN	SIGNAL	PIN
+DB(12)	1	-DB(12)	35
+DB(13)	2	-DB(13)	36
+DB(14)	3	-DB(14	37
+DB(15)	4	-DB(15)	38
+DB(P1)	5	-DB(P1)	39
GND	6	GND	40
+DB(0)	7	-DB(0)	41
+DB(1)	8	-DB(2)	42
+DB(2)	9	-DB(2)	43
+DB(3)	10	-DB(3)	44
+DB(4)	11	-DB(4)	45
+DB(5)	12	-DB(5)	46
+DB(6)	13	-DB(6)	47
+DB(7)	14	-DB(7)	48
+DB(P)	15	-DB(P)	49
DIFFSENS	16	GND	50
TERMPWR	17*	TERMPWR	51*
TERMPWR	18	TERMPWR	52
GND	19	GND	53
+ATN	20	-ATN	54
GND	21	GND	55
+BSY	22	-BSY	56
+ACK	23	-ACK	57
+RST	24	-RST	58
+MSG	25	-MSG	59
+SEL	26	-SEL	60
+C/D	27	-C/D	61
+REQ	28	-REQ	62
+I/O	29	-I/O	63
GND	30	GND	64
+DB(8)	31	-DB(8)	65
+DB(9)	32	-DB(9)	66
+DB(10)	33	-DB(10)	67
+DB(11)	34	-DB(11)	68

Connector Type

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

SCSI Sense Keys

KEY	DESCRIPTION
0	NO SENSE There is no specific sense key information to be reported for the designated logical unit. This would be the case for a successful command or a command that received CHECK CONDITION or COMMAND TERMINATED status because one of the filemark, EOM, or ILI bits is set to one.
1	RECOVERED DATA The last command completed successfully with some recovery action performed by the target. Details may be determined by examining the additional sense bytes and the information field.
2	NOT READY The logical unit addressed cannot be accessed. Operator intervention may be required to correct this condition.
3	MEDIUM ERROR The command terminated with a non-recovered error condition that was probably caused by a flaw in the medium or an error in the recorded data. This sense key may also be returned if the target is unable to distinguish between a flaw in the medium and a specific hardware failure (sense key 4).
4	HARDWARE ERROR The target detected a non-recoverable hardware failure while performing the command or during self test.
5	ILLEGAL REQUEST There was an illegal parameter in the command descriptor block or in the additional parameters supplied as data for some commands. If the target detects an invalid parameter in the command descriptor block, then it shall terminate the command without altering the medium. If the target detects an invalid parameter in the additional parameters supplied as data, then the target may have already altered the medium. This sense key may also indicate that an invalid IDENTIFY message was received.
6	UNIT ATTENTION The removable medium may have been changed or the target has been reset.
7	DATA PROTECT A command that reads or writes the medium was attempted on a block that is protected from this operation.
8	BLANK CHECK A write-once device or a sequential-access device encountered blank medium or format-defined end-of-data indication while reading or a write-once device encountered.
9	Vendor Specific This key is available for reporting vendor specific conditions.
a	COPY ABORTED A COPY, COMPARE, or COPY AND VERIFY command was aborted due to an error condition on the source device, the destination device, or both.
b	ABORTED COMMAND The target aborted the command. The initiator may be able to recover by trying the command again.
c	HARDWARE ERROR The target detected a non-recoverable hardware failure while performing the command or during self test.
d	VOLUME OVERFLOW A buffered peripheral device has reached the end-of-partition and data may remain in the buffer that has not been written to the medium.
e	MISCOMPARE The source data did not match the data read from the medium.
f	Reserved

SCSI Sense Codes

BYTE		DESCRIPTION
12 -	- 13	Additional Sense Code (ASC) Additional Sense Code Qualifier (ASCQ)
00	00	No additional sense information
00	01	Filemark detected
00	02	End of partition/medium detected
00	03	Setmark detected
00	04	Begining-of-Partition/Medium detected
00	05	End of data detected
00	11	Audio play operation in progress
00	12	Audio play operation paused
00	13	Audio play operation successfully completed
00	14	Audio play operation stopped due to error
00	15	No current audio status to return
01	00	No index/sector signal
02	00	No seek complete
03	00	Peripheral device write fault
03	01	No write current
03	02	Excessive write errors
04	00	Logical unit not ready, cause not reportable
04	01	Logical unit is in progress of becoming ready
04	02	Logical unit not ready, initiating command required
04	03	Logical unit not ready, manual intervention required
04	04	Logical unit not ready, format in progress
05	00	Logical unit does not respond to selection
06	00	No reference position found
07	00	Multiple peripheral devices selected
08	00	Logical unit communication failure
08	01	Logical unit communication time out
08	02	Logical unit communication parity error
09	00	Track following error
09	01	Tracking servo failure
09	02	Focus servo failure
09	03	Spindle servo failure
0a	00	Error log overflow
0c	00	Write error
0c	01	Write error recovered with auto reallocation
0c	02	Write error - auto reallocation failed
10	00	ID CRC or ECC error
11	00	Unrecovered read error
11	01	Read retries exhausted
11	02	Error log too long to correct
11	03	Multiple read errors
11	04	Unrecovered read error - auto reallocate failed
11	05	L-EC uncorrectable error
11	06	CIRC unrecovered error
11	07	Data resynchronization error
11	08	Incomplete block read
11	09	No gap found
11	0a	Miscorrected error
12	00	Address mark not found for ID field
13	00	Address mark not found for data field
14	00	Recorded entity not found
14	01	Record not found
15	00	Random positioning error
15	01	Mechanical positioning error
15	02	Positioning error detected by read of medium
16	00	Data synchronization mark error
17	00	Recovered data with no error correction applied
17	01	Recovered data with retries
17	02	Recovered data with positive head offset
17	03	Recovered data with negative head offset
17	04	Recovered data with retries and/or CIRC applied
17	05	Recovered data using previous sector
17	06	Recovered data without ECC - Data auto-reallocated
18	00	Recovered data with error correction applied
18	01	Recovered data with error correction & retries applied
18	02	Recovered data with ECC and/or retries
18	03	Recovered data with CIRC
18	04	Recovered data with LEC
19	00	Defect list error
19	01	Defect list not available
19	02	Defect list error in primary list
19	03	Defect list error in grown list
1a	00	Parameter list length error
1b	00	Synchronous data transfer error
1c	00	Defect list not found
1c	01	Primary defect list not found
1c	02	Grown defect list not found
1d	00	Miscompare during verify operation
1e	00	Recovered ID with ECC correction
20	00	Invalid command operation code
21	00	Logical block address out of range
21	01	Invalid element address
22	00	Illegal function for device type
24	00	Invalid field in CDB
25	00	Logical unit not supported
26	00	Invalid field in parameter list
26	01	Parameter not supported
26	02	Parameter value invalid
26	03	Threshold parameters not supported
27	00	Write protected
28	00	Not ready to ready transition
28	01	Import / Export element accessed
29	00	Power-On, reset, or bus device reset occurred
2a	00	Parameters changed
2a	01	Mode parameters changed
2a	02	Log parameters changed
2b	00	Copy cannot execute since host cannot disconnect
2c	00	Command sequence error
2c	01	Too many windows specified
2c	02	Invalid combination of windows specified
2d	00	Overwrite error on update in place
2f	00	Commands cleared by another initiator
30	00	Incompatible medium installed
30	01	Cannot read medium - unknown format
30	02	Cannot read medium - incompatible format
30	03	Cleaning cartridge installed
31	00	Medium format corrupted
31	01	Format command failure
32	00	No defect spare location available
32	01	Defect list update failure
33	00	Tape length error
36	00	Ribbon/Ink/Toner faliure
37	00	Rounded parameter
39	00	Saving parameters not supported
3a	00	Medium not present
3b	00	Sequential positioning error
3b	01	Tape position error at begining of medium
3b	02	Tape position error at end of medium
3b	03	Tape or electronic vertical forms unit not ready
3b	04	Slew failure
3b	05	Paper jam
3b	06	Failed to sense top of form
3b	07	Failed to sense bottom of form
3b	08	Reposition error
3b	09	Read past end of medium
3b	0a	Read past begining of medium
3b	0b	Position past end of medium
3b	0c	Position past begining of medium
3b	0d	Medium destination element full
3b	0e	Medium source element empty
3d	00	Invalid bits in identify message
3e	00	Logical unit has not self configured yet
3f	00	Target operating conditions have changed
3f	01	Microcode has been changed
3f	02	Changed operating definition
3f	03	Inquiry data has changed
40	nn	Diagnostic failure on component nn (80h-ffh)
41	00	Data path failure
42	00	Power-On or Self-Test failure
43	00	Message error
44	00	Internal target failure
45	00	Select/Reselect failure
46	00	Unsuccessful soft reset
47	00	SCSI parity error
48	00	Initiator detected error message received
49	00	Invalid message error
4a	00	Command phase error
4b	00	Data phase error
4c	00	Logical unit failed self configuration
4e	00	Overlapped commands attempted
50	00	Write append error
50	01	Write append position error
50	02	Position error related to timing
51	00	Erase failure
52	00	Cartridge fault
53	00	Media load/eject failed
53	01	Unload tape failure
53	02	Medium removal prevented
54	00	SCSI to host system interface failure
55	00	System resource failure
57	00	Unable to recover table-of-contents
58	00	Generation does not exist
59	00	Updated block read
5a	00	Operator request or state change input
5a	01	Operator medium removal request
5a	02	Operator selected write protect
5a	03	Operator selected write permit
5b	00	Log exception
5b	01	Threshold condition met
5b	02	Log counter at maximum
5b	03	Log list codes exhausted
5c	00	RPL status change
5c	01	Spindles synchronized
5c	02	Spindles not synchronized
60	00	Lamp failure
61	01	Unable to acquire video
61	02	Out of focus
62	00	Scan head positioning error
63	00	End of user area encountered on this track
64	00	Illegal mode for this track

80	80	Vendor unique ASC and ASCQ
through
ff	ff	Vendor unique ASC and ASCQ


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