June, 2010 | DataRecoveryUnion.com

Different operating systems have different Partition Type bytes. The most common DOS partition type is 6h, which is used for Primary DOS partitions greater than 32 Mbytes. Here is a list of known (and suspected) partition type bytes:00 Not Occupied 01 DOS, Primary Partition (12-bit FAT, <16MB) 02 XENIX root 03 XENIX usr 04 DOS, Primary Partition (16-bit FAT, >=16MB and <32MB) 05 DOS, Extended Partition 06 DOS, Primary Partition (16-bit FAT, >32MB) 07 OS/2 HPFS, Win NTFS, QNX ver 2, or Adv UNIX 08 AIX – boot 09 AIX – data, Coherent 0A OS/2 BtMgr 0B PRI DOS 512 Mbytes – 2 Tbytes FAT32 Win95, OSR2 & 98 0C EXT DOS 512 Mbytes – 2 Tbytes FAT32 Win95, OSR2 & 98 0E PRI DOS 32 Mbytes-2 Gbytes FAT16 Windows 95 & 98 0F EXT DOS 0-2 Gbytes Windows 95 & 98 10 OPUS 12 Compaq diagnostics partition 40 VENIX 80286 50 DiscWizard Starter Edition read only DOS partition 51 DiscWizard Starter Edition read/write DOS partition 52 CPM, Microport System V/386 54 DiscWizard Starter Edition non-DOS partition 55 Micro House EZ-Drive ® non-DOS partition 56 Golden Bow Vfeature partition 61 Storage Dimensions SpeedStor partition 63 UNIX – AT&T System V/386 64 Novell NetWare 286 65 Novell NetWare 386 75 PC/IX IBM 77 QNX POSIX partition 78 QNX POSIX partition (secondary) 79 QNX POSIX partition (secondary) 80 Minix (v1.4a and earlier) 81 Minix (v1.4b and later), Linux 82 Linux swap partition 83 Linux native file system 93 Amoeba file system 94 Amoeba bad block table?…

Hard Disk Repair

What is the length of cable that I can use with a Serial ATA drive?

DATARECOVERYUNION.COM14 years ago3 years ago01 mins

Serial ATA cables are available in many lengths up to 1 meter. Minimum cable length is 12 inches, using shorter cables can cause timing, or noise interference on the cable. The same conditions apply to cables that are too long. Though the Serial ATA specification calls out supporting cable lengths up to 1 meter or 39.37 inches, PCB traces from the cable connection to the host and drive controllers ASIC, adds length to the bus.…

Hard Disk Repair

Tips for upgrading drive in Macintosh computer

DATARECOVERYUNION.COM14 years ago3 years ago06 mins

To upgrade the drive in your Macintosh computer, the first thing to consider is do you want to upgrade the internal drive or do you just want to add additional storage with an external drive? Internal Drive vs. External Drive An internal drive will generally provide much better performance on the computer and can be used to store programs and data.…

Hard Disk Repair

Tips for Replacing a Drive from a Failed RAID

DATARECOVERYUNION.COM14 years ago3 years ago04 mins

There are several items to consider when replacing a drive from a failed RAID. If you are building a new RAID, then all drives in the array should be the identical model if at all possible. However, if you must replace a failed drive, it can sometimes be difficult to find the same model if that model is out of production.…

Hard Disk Repair

Hard Drive Errors

DATARECOVERYUNION.COM14 years ago3 years ago03 mins

1. ‘No ROM Basic’ Error When a partition is not set to the bootable partition. This usually occurs when the drive at one time was a slave and now has moved into the primary position. Verify that the hard drive has an “Active/Primary” DOS partition.…

Hard Disk Repair

Partition Offset Information

DATARECOVERYUNION.COM14 years ago11 years ago05 mins

Partition Offset Information is a simple, single file Windows utility you can run to read and display the starting LBA for every partition. This tool detects disk drives that report themselves as large sector drives, typically 4KiB sectors, and analyzes the starting sector of a partition to see if the logical file system clusters are aligned to the disk drive or not.…

Hard Disk Repair

Partition Offset Information (Part II)

DATARECOVERYUNION.COM14 years ago3 years ago02 mins

How to check if a partition is aligned? Seagate has created a simple Windows utility, Partition Offset Information, to read and display the starting LBA for every partition. This tool can analyze the starting sector of a partition if it is misaligned or not.…

Hard Disk Repair

Will adding an ATA PCI Adapter card increase disk performance?

DATARECOVERYUNION.COM14 years ago3 years ago01 mins

It really depends if the motherboard on the system supports the transfer rate of the hard drive. For example, if the motherboard on the system only supports ATA 66 and the hard drive is ATA 133 the drive will downgrade the transfer rate limiting the transfer rate to ATA 66.…

Hard Disk Repair

I have multiple partitions and my last partition regularly disappears

DATARECOVERYUNION.COM14 years ago11 years ago01 mins

There are two workarounds for this phenomenon:Only use one primary DOS partition. Using FDISK, follow the steps below when partitioning the drive:Create a primary DOS partition with the desired size. Reboot Create an extended DOS partition using 99% of the available space remaining instead of 100% Reboot Create as many logical DOS drives as required, but with a reboot between each logical drive created.…

June 2010

Partition Record Technical Details