HN-M750MBB Problem

[kpeddie]

Have an HN-M750MBB with what appeared to be some head issues, greyerrors on at least first two heads. Doesnt want to spend much and needs it back immediatly so tried to initiliaze with a different headmap in RAM. Now problem has changed and im getting this in terminal even after disconnecting it and restarting pc3k. Drive now spins up and spins down and then back up again. Has it corrupted the ROM?

ActiveFW : 00
FWVer : 0001
SATA PLL cal done
DDR size detected = 8MB

DDR size detected = 8MB

*PAUNI_L2957*PA VID=0006 PN=0009 Rev=0002- PA_UNI Found
*PAUNI_L2957*PA VID=0006 PN=0009 Rev=0002- PA_UNI FoundU
S_0:20
SO_1
SPU@34C,5039mV
IS=6
CLA ..36/78
HO..OK
HO RPM=778 OK
AC 1291
ST..OK
mS1 00000003
GT:426
SC(L):4099/53
BE.N:13
LDST TO -3272
UD..OK : 53
PK_3 C: 0 H:0
UDed
PK_4 C: 0 H:1
UF7 SE
UDed
PK_3 C: 0 H:1
SO_1
SPU@34C,5009mV
IS=3
CLA ..36/67
HO..OK
HO RPM=2268 OK
AC 1001
ST..OK
GT:427
SC(L):4098/17
BE.N:12
LDST TO -3347
UD..OK : 17
PK_3 C: 0 H:2
UDed
PK_4 C: 0 H:3
UF7 SE
UDed
PK_3 C: 0 H:3
SO_1
SPU@34C,5012mV
IS=6
CLA ..36/66
HO..OK
HO RPM=2252 OK
AC 1007
ST..OK
GT:426
SC(L):4097/71
BE.N:14
LDST TO -3555
UD..OK : 71
PK_3 C: 0 H:0
UDed
PK_4 C: 0 H:1
UF7 SE
UDed
PK_3 C: 0 H:1
SO_1
SPU@34C,5016mV
IS=5
CLA ..36/65
HO..OK
HO RPM=2239 OK
AC 1012
ST..OK
GT:427
SC(L):4099/37
BE.N:14
LDST TO -2692
UD..OK : 37
PK_3 C: 0 H:2
GT:428
SC(L):4090/8
BE.N:11
LDST TO -3569
UD..OK : 8
PK_3 C: 0 H:3
UDed
PK_4 C: 0 H:0
UF7 SE
UDed
PK_3 C: 0 H:0
SO_1
SPU@34C,5036mV
IS=5
CLA ..36/65
HO..OK
HO RPM=2255 OK
AC 998
ST..OK
GT:427
SC(L):4102/58
BE.N:11
LDST TO -3690
UD..OK : 58
PK_3 C: 0 H:1
UDed
PK_4 C: 0 H:2
UF7 SE
UDed
PK_3 C: 0 H:2
SO_1
SPU@34C,5016mV
IS=3
CLA ..36/64
HO..OK
HO RPM=2210 OK
AC 1020
ST..OK
GT:428
SC(L):4101/14
BE.N:10
LDST TO -3986
UD..OK : 14
PK_3 C: 0 H:3
UDed
PK_4 C: 0 H:0
UF7 SE
UDed
PK_3 C: 0 H:0
SO_1
SPU@34C,5019mV
IS=6
CLA ..36/64
HO..OK
HO RPM=2187 OK
AC 1023
ST..OK
GT:427
SC(L):4103/66
BE.N:15
LDST TO -4004
UD..OK : 66
PK_3 C: 0 H:1
UDed
PK_4 C: 0 H:2
UF7 SE
UDed
PK_3 C: 0 H:2

[kpeddie]

They didnt want to go for it anyway so its not of any real importance but would like to know what likely happened. Only changed something in RAM but it seemed to affect the ROM.

[fzabkar]

Did you save copies of the ROM before and after?

I can't understand why people believe that a ROM can be "corrupt" if the drive still spins. A corrupt ROM would have a bad checksum, and any properly designed system should verify the integrity of its firmware before booting from it. Surely a corrupt ROM would prevent the drive from passing its own POST, with the result that it wouldn't spin?

The only other thing I can think of is that perhaps your tool modified the head map in the ROM (and recalculated the checksum). Does that make any sense?

[kpeddie]

Sorry, shouldnt have said corrupt, just altered.

I think this has happened in the past to me and I copied the original rom back to get it back to pre-exisiting state yes but it obviously shouldnt be doing that in the first place.

Don't have the drive anymore so cant test though.

[Martin]

What is the problem to try other ROM with similar FW, or just from similar model? Further you can localize the problem.