Toshiba MQ01ABD075 donor issue

[manager_lg]

I have a Toshiba MQ01ABD075 (750GB) with a bad head. I succesfully imaged 65% of lba's and now am looking for a donor drive. So the question is, is it MQ01ABD100 with one head depopulated? In other words, should I look for a 1TB donor?

[pcimage]

1Tb should be good, underlying issues excepted.

[pcimage]

1Tb should be good, underlying issues excepted.

[fzabkar]

I may be able to confirm the head map from a CP or ROM dump. I could also determine the bad head from an analysis of the Glist (I have written a tool for this purpose).

[pcimage]

I may be able to confirm the head map from a CP or ROM dump. I could also determine the bad head from an analysis of the Glist (I have written a tool for this purpose).

Maybe yes, but if the aim is Data Recovery then it would be a lot simpler to use a 1Tb donor.

In fact a lot of 750Gb drives we’ve come across have all 4 heads physically installed with one switched off, typically H3 or occasionally H0.

[manager_lg]

I may be able to confirm the head map from a CP or ROM dump. I could also determine the bad head from an analysis of the Glist (I have written a tool for this purpose).

Here you are, sir.

Attachments

Toshiba_MQ01ABD075.zip

Toshiba MQ01ABD075 ROM dump

(310.89 KiB) Downloaded 704 times

[manager_lg]

Maybe yes, but if the aim is Data Recovery then it would be a lot simpler to use a 1Tb donor.

I agree coz most of the sellers on E-bay and similiar sites don't provide any information about head maps etc. But it would still be nice to know which head is acting up.

[fzabkar]

I attempted to analyse the CPs in earlier models here:

Analysis of Toshiba CPs:
http://www.hddoracle.com/viewtopic.php?f=59&t=2044

There are some similarities, but a lot of differences. I confess that I don't understand the actual meanings of the various CPs, but one can easily discern the head/media related data,

For example, CP 0x00AA ("TO") consists of 6 groups. There appear to be 3 populated and 3 unpopulated heads. The data for the unpopulated heads (3,4,5) look like templates. I don't know whether heads 0, 1 and 2 are logical or physical heads.

Code:

Head #0

E006 0DEE E906 0DEE E006 0FEE F106 09EE F106 09EE 0207 FFED 0B07 F9ED 1B07 EBED 2C07 DBED 3507 D2ED 4607 BEED 5F07 9DED 7907 79ED 8A07 5FED 9A07 44ED BC07 08ED DE07 C8EC F807 94EC 1908 4DEC 3B08 01EC 5D08 B1EB 9008 33EB C308 AEEA ED08 3CEA 2809 95E9 6C09 CCE8 A709 17E8 F309 25E7 400A 26E6 940A 06E5 FA0A 9DE3 5F0B 2BE2 CE0B 88E0 440C BCDE D40C 79DC 5B0D 4BDA 5B0D 4BDA BCF8 E91E

Head #1

1B07 65EC 1B07 66EC 2C07 62EC 3507 5FEC 3D07 5BEC 4E07 51EC 5F07 45EC 6807 3EEC 7907 2EEC 8A07 1CEC A307 FEEB B407 E8EB C507 D0EB DE07 AAEB F807 7FEB 1108 52EB 3308 12EB 4C08 E0EA 6E08 98EA 9808 3AEA C308 D4E9 E508 80E9 2009 E6E8 5309 5CE8 8E09 B5E7 C909 06E7 150A 1DE6 620A 28E5 B60A 12E4 130B D3E2 790B 6AE1 DE0B F8DF 5D0C 18DE DC0C 29DC 6C0D E7D9 FC0D 93D7 FC0D 93D7 14F9 721D

Head #2

E006 31ED D806 33ED E006 31ED E006 31ED F106 29ED FA06 24ED 0207 1EED 1B07 09ED 2407 01ED 3507 EFEC 4607 DBEC 5707 C5EC 7007 A1EC 8A07 7AEC A307 50EC BC07 24EC D607 F3EB F807 AFEB 1108 79EB 3B08 1BEB 6608 B6EA 8708 64EA BA08 DFE9 ED08 55E9 2809 AEE8 6409 FDE7 A709 2FE7 F309 3DE6 400A 3EE5 9D0A FFE3 020B 99E2 700B 07E1 E70B 45DF 6E0C 37DD F60C 15DB 970D 7BD8 970D 7BD8 8CFD 6F0A

Head #3

3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 0000 0000 0000 0000

Head #4

3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 0000 0000 0000 0000

Head #5

3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 3603 2AF9 0000 0000 0000 0000

0000 0000 0000 0000 0000 0000 0022

This CP looks interesting (head map?):

00EF_HL.bin

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00000000  48 4C 00 01 02 03 00 00 01 01 02 02 00 00 00 00  HL..............
00000010  00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00

Another head related CP?

BB_1_SH.bin

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00000000  53 48 82 96 84 D0 D0 D0 00 00 00 00 00 00 00 00  SH..............
                h0 h1 h2 h3 h4 h5

00000010  00 00 00 00 80 80 80 80 80 80 00 00 00 00 00 5B
                      h0 h1 h2 h3 h4 h5 ?

BTW, the Glist is a separate module in the SA, not in the ROM.

Attachments

MQ01ABD075_ROM_CPs.7z

(11.63 KiB) Downloaded 591 times

[fzabkar]

Here are the same CPs from a 2-head model (MQ01ABD050V):

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0007B0E0  53 48 8C B1 D0 D0 D0 D0 00 00 00 00 00 00 00 00  SH..............
                h0 h1 h2 h3 h4 h5

0007B0F0  00 00 00 00 80 80 80 80 80 80 00 00 00 00 00 26

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0007EAB0  48 4C 02 03 00 00 00 00 01 01 00 00 00 00 00 00  HL..............
                ^^^^^^^^^^^^^^^^^ -----------------------
       logical/physical head map

0007EAC0  00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 07
          ----------- ^^ 2 heads

It would appear that logical heads 0 and 1 correspond to physical heads 2 and 3.

Therefore it would appear that your MQ01ABD075 drive has 4 physical heads, and that the logical-to-physical mapping is 1-to-1. However, other CPs suggest that logical/physical head #3 has been switched off.

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00000000  48 4C 00 01 02 03 00 00 01 01 02 02 00 00 00 00  HL..............
                ^^^^^^^^^^^^^^^^^ -----------------------
       logical/physical head map

00000010  00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00
          ----------- ^^ 4 heads

[manager_lg]

Here are the same CPs from a 2-head model (MQ01ABD050V):

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0007B0E0  53 48 8C B1 D0 D0 D0 D0 00 00 00 00 00 00 00 00  SH..............
                h0 h1 h2 h3 h4 h5

0007B0F0  00 00 00 00 80 80 80 80 80 80 00 00 00 00 00 26

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0007EAB0  48 4C 02 03 00 00 00 00 01 01 00 00 00 00 00 00  HL..............
                ^^^^^^^^^^^^^^^^^ -----------------------
       logical/physical head map

0007EAC0  00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 07
          ----------- ^^ 2 heads

It would appear that logical heads 0 and 1 correspond to physical heads 2 and 3.

Therefore it would appear that your MQ01ABD075 drive has 4 physical heads, and that the logical-to-physical mapping is 1-to-1. However, other CPs suggest that logical/physical head #3 has been switched off.

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00000000  48 4C 00 01 02 03 00 00 01 01 02 02 00 00 00 00  HL..............
                ^^^^^^^^^^^^^^^^^ -----------------------
       logical/physical head map

00000010  00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00
          ----------- ^^ 4 heads

Thank you, Fzabkar, very much, for your explanations. Yes MQ01ABD075 does have 4 phisycal heads. Mapfile log looks like one head was switched off during factory selftest and one of three logical heads is being weak.

[fzabkar]

Do you have a dump of your Glist?

[cpm0088]

somethings to try

try increasing the read timeout
Read via PIO mode (use hardware retries)
Read via utility by generating virtual compiler.