User:Tingo/sg3 utils - Revision history

Tingo: /* Resurrection */ added link to setblocksize subpage

2016-09-07T18:28:20Z

Resurrection: added link to setblocksize subpage

← Older revision		Revision as of 18:28, 7 September 2016
Line 171:		Line 171:

	== Resurrection ==		== Resurrection ==
	As it turns out, everything was not lost. With the help of a machine running Linux (Fedora 24 server) and setblocksize, I was able to bring the drive back to life - with 1024 byte block size. dmesg output:		As it turns out, everything was not lost. With the help of a machine running Linux (Fedora 24 server) and [[User:Tingo/setblocksize\|setblocksize]], I was able to bring the drive back to life - with 1024 byte block size. dmesg output:
	root@music1# dmesg \| grep da0		root@music1# dmesg \| grep da0
	da0 at ahc0 bus 0 target 0 lun 0		da0 at ahc0 bus 0 target 0 lun 0

Tingo: added info about sg_format and sg_readcap output on changed drive

2016-09-07T18:25:15Z

added info about sg_format and sg_readcap output on changed drive

@@ Line 169: / Line 169: @@
 == Other tools ==
 [http://micha.freeshell.org/scsi/ setblocksize] by Michael Baeuerle - this one is written for Seagate disks, and has been tested on ST31200N. It is Linux only
 [[Category:Seagate]] [[Category:ST31200N]] [[Category:SCSI]] [[Category:Hard drive]] [[Category:Testing]] [[Category:sg3_utils]]

Tingo: Added "Other tools" section, and setblocksize

2016-09-05T17:43:48Z

Added "Other tools" section, and setblocksize

← Older revision		Revision as of 17:43, 5 September 2016
Line 167:		Line 167:
	No changes made. To format use '--format'. To resize use '--resize'		No changes made. To format use '--format'. To resize use '--resize'
	So that was a bricked drive.		So that was a bricked drive.
			== Other tools ==
			[http://micha.freeshell.org/scsi/ setblocksize] by Michael Baeuerle - this one is written for Seagate disks, and has been tested on ST31200N. It is Linux only

	[[Category:Seagate]] [[Category:ST31200N]] [[Category:SCSI]] [[Category:Hard drive]] [[Category:Testing]] [[Category:sg3_utils]]		[[Category:Seagate]] [[Category:ST31200N]] [[Category:SCSI]] [[Category:Hard drive]] [[Category:Testing]] [[Category:sg3_utils]]

Tingo: created User:Tingo/sg3_utils page

2016-09-04T21:50:11Z

created User:Tingo/sg3_utils page

New page

The [http://sg.danny.cz/sg/sg3_utils.html sg3_utils] package contains utilities that send SCSI commands to devices. It contains lots of programs for interacting with SCSI devices, one of those programs is '''sg_format'''., which can be used to format, resize or brick a SCSI hard drive.
== Trying sg_format on a sacrificial drive ==
I use a machine with an old version of FreeBSD installed
root@music1# uname -a
FreeBSD music1.kg4.no 7.0-STABLE FreeBSD 7.0-STABLE #0: Fri Aug 15 12:56:35 CEST 2008 root@music1.kg4.no:/usr/obj/usr/src/sys/GENERIC i386
It has an old version of sg3_utils installed
root@music1# portversion -vF sg3*
sg3_utils-1.25 = up-to-date with port
=== Drive info ===
The drive I tested on is an old Seagate ST31200N. FreeBSD detects it like so:
root@music1# dmesg | grep da0
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST31200N 8008> Fixed Direct Access SCSI-2 device
da0: 10.000MB/s transfers (10.000MHz, offset 15)
da0: Command Queueing Enabled
da0: 1006MB (2061108 512 byte sectors: 64H 32S/T 1006C)
and
root@music1# camcontrol devlist
<SEAGATE ST31200N 8008> at scbus0 target 0 lun 0 (pass0,da0)
=== Before testing ===
read capacity
root@music1# sg_readcap /dev/da0
Read Capacity results:
Last logical block address=2061107 (0x1f7333), Number of blocks=2061108
Logical block length=512 bytes
Hence:
Device size: 1055287296 bytes, 1006.4 MiB, 1.06 GB
read format
root@music1# sg_format /dev/da0
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=512 [0x200]
Read Capacity (10) results:
Number of blocks=2061108
Block size=512 bytes
No changes made. To format use '--format'. To resize use '--resize'
=== Test: try to format it ===
Try a format, with 1024 as size
root@music1# sg_format --format --size=1024 /dev/da0
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=512 [0x200]

A FORMAT will commence in 10 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
A FORMAT will commence in 5 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
Format command, illegal parameter
FORMAT failed
try '-v' for more information
failed, try with '-v'
root@music1# sg_format -v --format --size=1024 /dev/da0
inquiry cdb: 12 00 00 00 24 00
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
PROTECT=0
mode sense (10) cdb: 5a 00 01 00 00 00 00 00 fc 00
mode sense (10): requested 252 bytes but got 28 bytes
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=1024 [0x400]

A FORMAT will commence in 10 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
A FORMAT will commence in 5 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
format cdb: 04 18 00 00 00 00
format unit: Fixed format, current; Sense key: Illegal Request
Additional sense: Invalid field in parameter list
Field replaceable unit code: 4
Sense Key Specific: Error in Data byte 1 bit 1
Format command, illegal parameter
FORMAT failed
try with '-vvv'
root@music1# sg_format -vvv --format --size=1024 /dev/da0
inquiry cdb: 12 00 00 00 24 00
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
PROTECT=0
mode sense (10) cdb: 5a 00 01 00 00 00 00 00 fc 00
mode sense (10): requested 252 bytes but got 28 bytes
mode sense (10): response
00 1a 00 00 00 00 00 08 00 00 00 00 00 00 04 00
81 0a 00 21 30 00 00 00 16 00 ff ff
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=1024 [0x400]

A FORMAT will commence in 10 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
A FORMAT will commence in 5 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
format cdb: 04 18 00 00 00 00
format parameter list:
00 02 00 00
format unit: Fixed format, current; Sense key: Illegal Request
Additional sense: Invalid field in parameter list
Field replaceable unit code: 4
Sense Key Specific: Error in Data byte 1 bit 1
Raw sense data (in hex):
70 00 05 00 00 00 00 0a 00 00 00 00 26 00 04 89
00 01
Format command, illegal parameter
FORMAT failed
not sure what the real problem is. Perhaps the drive doesn't support the format unit command, or it didn't like the 1024 for size.

It still reports 1024 as block size
root@music1# sg_format /dev/da0
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=1024 [0x400]
No changes made. To format use '--format'. To resize use '--resize'
Ok. Can I format it back to 512 block size then?
root@music1# sg_format --format --size=512 /dev/da0
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=1024 [0x400]

A FORMAT will commence in 10 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
A FORMAT will commence in 5 seconds
ALL data on /dev/da0 will be DESTROYED
Press control-C to abort
Format command, illegal parameter
FORMAT failed
try '-v' for more information
No, that didn't work either. I also tried other variations of the sg_format command; none did work.
=== The aftermath: a bricked drive ===
After I rebooted the the machine, I got the usual drive info in dmesg output:
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST31200N 8008> Fixed Direct Access SCSI-2 device
da0: 10.000MB/s transfers (10.000MHz, offset 15)
da0: Command Queueing Enabled
followed by the (more unusual)
da0: Attempt to query device size failed: MEDIUM ERROR, Medium format corrupted
(da0:ahc0:0:0:0): READ CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0
(da0:ahc0:0:0:0): CAM Status: SCSI Status Error
(da0:ahc0:0:0:0): SCSI Status: Check Condition
(da0:ahc0:0:0:0): MEDIUM ERROR asc:31,0
(da0:ahc0:0:0:0): Medium format corrupted field replaceable unit: 1
(da0:ahc0:0:0:0): Retrying Command (per Sense Data)
and this repeats a good number of times.

read capacity says that the drive is broken
root@music1# sg_readcap /dev/da0
READ CAPACITY (10) failed [res=-1], try with '-v'
root@music1# sg_readcap -v /dev/da0
read capacity (10) cdb: 25 00 00 00 00 00 00 00 00 00
read capacity (10): Fixed format, current; Sense key: Medium Error
Additional sense: Medium format corrupted
Field replaceable unit code: 1
sg_format says that the drive is back to 512 block size
root@music1# sg_format /dev/da0
SEAGATE ST31200N 8008 peripheral_type: disk [0x0]
Mode Sense (block descriptor) data, prior to changes:
Number of blocks=0 [0x0]
Block size=512 [0x200]
No changes made. To format use '--format'. To resize use '--resize'
So that was a bricked drive.
[[Category:Seagate]] [[Category:ST31200N]] [[Category:SCSI]] [[Category:Hard drive]] [[Category:Testing]] [[Category:sg3_utils]]