When we are dealing with different computer forensic cases, we usually need to perform disk imaging. Disk imaging in computer forensics is different and much stricter than the common data copy and disk image, it must ensure the copied data is exactly the same with available simutaneous verification reports such as Hash or MD5 verification codes. Computer forensic disk imaging is sector by sector image imaging all the contents of original disk including the location of the data, the file system, the lost or corrupted data, the hidden data, etc.
Fujitsu Limited has transferred its hard disk drive (HDD) business to Toshiba Corporation on October 1st, 2009. Fujitsu drive initializes itself at power-up as follows: 1. Power-up
47: Missed data sync byte 48: Missed data sync after a split 49: Thermal asperity code 4A: Error didn’t repeat during dynamic sparing mini cert (usually refers to cases of log overflow) 4B: Error log full 4C: Controller stopped without a reason 4D: Error reassigned during dynamic sparing 4E: Block release timeout error 4F: Buffer ready error 50: Slipped sector (P-List) 51: Alternated sector (G-List) 52: Pad and fill defects 53: Hard error w/AT retries no error with full retries (instability) 54: Error during scratchfill 55: Bad alt dest ID info (all messages refer to Niwot addressing whenever alternative destination is mentioned) 56: Unable to find valid alt dest 57: Unable to delete alt dest 58: Too many defects per head 59: Too many defects per track 5A: Too many dynamic slips 5C: Unknown full slip failure 5E: Pad and fill defects 5F: Entire defect span was not found in User Defect List 60: No spares available (for reassignment of defective sectors, tracks, servo labels and any resources required for the current operation in general) 61: Write blocked w/o a reason 62: Write gate came on early 63: Write gate went off late 64: GC thermal sensor fault detected 65: Shock sensor fault detected 66: Attempt made to write at the wrong target location. 68: FW initiated disc sequencer reset 69: FW sequencer abort; split sector runaway RG 70: Bad disc resident cert/diag code 71: Unable to read system sectors code 72: Unable to read packwriter auto-stamp 73: Invalid defect info loaded 74: Invalid alt info table (usually refers to reserved defect lists) 88: Unable to learn good zap on track 89: Cylinder to be skipped out in loopback test 8A: Wedge slipped (track portion from sector xxx to sector yyy) 8B: Write ID failed 8C: Cylinder padded (physical coordinates apply to two cylinders at once – translator problems) 8D: Cylinder filled in 8E: Cylinder skipped out 8F: Max cylinder skips has been reached 90: Zapped burst 91: 2 consecutive zapped bursts 92: Too many zapped bursts on a track 93: Unable to zap – 2 consecutive bad bursts 94: Sumsquare of PES (one of adaptive parameters) on this track exceeds limit 95: Unable to zap bad burst 96: Too many position plus velocity threshold breaks 97: Zapped splice code 98: Encroachment code (any corruption of servo packets) 99: Max number of slipped tracks has been reached 9A: The slipped cyl requested does not exist. 9B: Head switch timeout error code A0: Preamp miscommunication A1: Reserve track defect list bad A2: Boot adaptives bad A3: Bad application code A4: Not enough sectors saved to the disc for adaptives A5: Application code checksum error A6: Application code not compatible CE: Cert test passed CF: Cert test failed ED: Attempt to write the user slip list but no valid list FB: Missing critical parameter FC: Command aborted (internal only) FD: R/w command rejected FE: Invalid address passed to Niwot FA: Un-initialized preamp code for new preamp interface FF: Unsupported code in the new preamp interface
To find a donor PCB or donor hitachi drive is one of the important factors to restore one patient hitachi drive with PCB malfunction or firmware or head damage which requires a swap. Hitachi DK23DA has the models of DK23DA-10F with capacity of 10GB, DK23DA-20F with capacity of 20GB, DK23DA-30F with capacity of 30GB and DK23DA-40F with capacity of 40GB. It has features of 10, 20, 30 or 40 GB in 9.5mm high package for maximum capacity slimline portable applications; ATA-5 interface with 2048kB read/write cache; Ultra DMA mode 5 (100 MB/s max.) supported; GMR head and MEEPRML read channel technology; 32-bit RISC microprocessor, Shock sensor, SMART; Use of Fluid Dynamic Bearing Motor to improve Acoustic and shock characteristics
The problem can be caused by a short circuit on PCB or a spindle controller malfunction. One contact of the Master jumper is connected to the ground circuit, the other is linked through a resistor array to pin 59 of the SH6950 spindle controller chip, i.e. if the voltage at the contact is = 0V, the drive will act as Master, 5V – Slave.
When we are going to perform HDD repair or data recovery, we need to dignose the hard drives first and find out the failure reasons. For data recovery companies or hdd repair or laptop repair companies, they usually use some professional hdd repair tools such as HD Doctor suite or PC3k. Seagate HDD repair is a little special compared with other HDD brands, many operations are completed in the CMD mode and you must understand the use of some special hdd commands.
Some Seagate drives based on Barracuda architecture can function both in COM and ATA terminal modes. Their list includes U5, Barracuda I – IV.
* ID – module identifier. * Copy – copy number
It’s good to save in data recovery field for personal data recovery cases by downloading free data recovery tools, that usually means free data recovery software . The following data recovery software is another tool we recommend for personal cases with logical hard drive failure including one of the following: Files emptied from the Recycle Bin, lost due to hard drive crash, formatted or damaged hard drive, virus infection and other unknown reasons.
Disk Drill is one newly released Mac data recovery software by CleverFiles. It is used to recover lost data including accidental deleted files, photos, documents, etc from internal and external hard disks, flash cards, etc.
