|HDAT2 FAQ (Frequently Asked Questions)|
|Q1: I received a 40 GB drive in replacement for a 20 GB model in PC. The drive is reported as 20 GB capacity. How can i get full capacity?|
A1: If you see in 'Device List' menu at your disk drive a notice
'!SET MAX: HPA IS ACTIVE', use 1. method, otherwise use 2. method.
In program HDAT2 select your disk drive and press Enter to show 'Main Menu'.
In 'Device List' menu at your disk drive you see notice '!SET MAX: HPA IS ACTIVE'.
After this you can also disable support of HPA feature:
Select 'Device Configuration Menu', then select 'Restore'
and press Enter.
If you don't see any error message, in 'Device List' menu press a key 'D'
to make new detection of devices or simple make restart of PC's and check
capacity of your hard drive.
|Q2: How to bypass a Security and/or DCO frozen state?|
a) The SECURITY FREEZE command is being set in the boot process.
This will prevent any further SECURITY related commands being sent until
the hard drive is power cycled. It is most likely your BIOS doing this.
Look in your BIOS configuration/setup, but some BIOS's do not have an option to turn this off,
so you may be required to find a different PC/BIOS.
b) Try to connect the drive to another controller channel (maybe the last one) or another position on the channel. Some BIOS's do not send the Freeze Lock command to all channel master/slave positions.
c) Hot-plug method with data cable: When the computer is off unplug the data cable from this hard drive. Power on PC, boot into DOS and then plug the data cable of the hard drive back in. I hope that the program will find this disk.
d) Hot-plug method with power cable: use this method at your own risk!
|Q3: Can i remove non-existent bad sectors from the file table FAT?|
A3: Yes, with file-system version program HDAT2FS or HDAT2 you can
This procedure will first compare both FAT copies and second tests all FAT entries for bad sectors. If program will find 'bad sector' entry, then all sectors in this cluster will be tested. If all these sectors are not bad program will remove this record of bad sectors.
|Q4: Connecting ATA/IDE Hard Drives|
A4: ATA/IDE devices use a ribbon cable to connect to each other.
Ribbon cables have all of the wires laid flat next to each other
instead of bunched or wrapped together in a bundle. IDE ribbon cables
have either 40 or 80 wires. There is a connector at each end of the
cable and another one about two-thirds of the distance from the
motherboard connector. This cable cannot exceed 18 inches in total
length (12 inches from first to second connector, and six inches
from second to third) to maintain signal integrity.
On the slower older 40-wire ATA cables, the Slave device, usually a CD-ROM or CD-ROM recorder/burner still goes on the END, but you need to set the jumpers as Slave. This is true even if you don't have a hard drive in the Master position. The Master for 40-wire cables goes on the the Middle connector.
If you want to use the cable select with the older drive on a 40-wire cable, you'll have to consult the maker of the drive for the instructions.
On the ATA66/100/133 standard 80-wire cable, the Master hard drive or your boot hard drive goes on the END of the cable. This is true whether or not you use the Master/Slave style or the Cable Select style.
The 40-pin 80-conductor cable is orientation specific. The cable connectors are color-coded: blue for the host connector, black and gray for the primary and secondary disk drives. The blue connector should be installed into the Primary IDE connector.
The blue connector attaches to the motherboard.
Along one side of the cable is a stripe. This stripe tells you that the wire on that side is attached to Pin 1 of each connector. Wire 20 is not connected to anything. In fact, there is no pin at that position. This position is used to ensure that the cable is attached to the drive in the correct position. Another way that manufacturers use to make sure that the cable is not reversed is by using a cable key. The cable key is a small plastic square on top of the connector on the ribbon cable that fits into a notch on the connector of the device. This allows the cable to attach in only one position.
|Q5: What are the differences between master/slave and cable select?|
A5: Two different protocols can be used for jumpering ATA devices,
including hard disk drives. One is the master-slave relationship. With
this protocol, one device is jumpered as master and the other is jumpered
as slave. The second protocol is cable select. With this protocol,
both devices are jumpered as cable select and their position on the cable
dictates which is the master and which is the slave. The end device is
master while the device on the middle of the cable is slave.
You can use either of these protocols but you cannot mix them on the same
Computers that use cable-select determine the master and slave drives by selecting or deselecting pin 28, CSEL, on the interface bus. Master and slave drives are determined by their physical position on the cable.
Configuration Using Cable Select
Cable Select is defined in the ATA-2 and ATA-3 specifications and is part of the ATA PnP standard and Microsoft's PC97 standard.
The standard 40-wire ATA ribbon cable and the 80-wire cable give different drive behavior when using Cable Select. If using the standard 40-wire cable, the Master goes in the middle connector and the Slave goes in the end connector. If using the 80-wire cable, attach the blue end connector to the system board or host controller, the gray middle connector to the Slave, and the black end connector to the Master.
All newer ATA hard drives can be jumpered as Cable Select (CS or CSEL). This is an alternate way to indicate which drive is master and which drive is slave (instead of jumpering one drive as master and one drive as slave). Cable Select jumpering requires a special IDE cable with wire 28 not connected to one of the drive connectors, which would configure the drive attached to that connector as the slave drive.
In order to use Cable Select jumpering, several conditions must be met. Both drives on a channel must support CSEL, both drives must be jumpered as CSEL, a CSEL cable must be used, and the host interface connector must support CSEL. For the host interface to support Cable Select, wire 28 must be grounded.
Although the Cable Select specification may simplify things in the future, there will probably be lots of confusion, especially on legacy systems, as this starts to be introduced. One problem will be in selecting the correct cable. Supposedly, the cables used for Cable Select will be clearly marked, with each connector labeled as Device 0 (or Master) or Device 1 (or Slave). If not clearly marked, it may not be easy to identify a CSEL cable visually. wire 28 can be checked for continuity.
A Cable Select cable can be constructed in various ways. Pin 28 may be non connected to the connector at the end of the cable or to the connector in the middle of the cable. Another design would have the host interface connector in the middle and the two drives would plug into each end of the cable, with the connector at one of the ends not connected to pin 28.
If both drives are set for CSEL and the host interface supports CSEL, but a regular cable is used, both drives will be seen as master.
A Cable Select cable can be used with master/slave drive jumpering.
Another problem will be with host interfaces on legacy motherboards and controller cards. If pin 28 is not grounded on the host interface, drives connected to either connector on the CSEL cable will be seen as slave. It will be common to find that pin 28 is open or high on many older IDE interfaces. This can be checked with a voltmeter.
|Q6: Host Protected Area (HPA) vs. 28/48-bit LBA mode|
A6: There is a problem of incompatibility on some hard drives
(e.g. Seagate and/or in an external Maxtor One Touch) when you are using 48-bit
command for removing Host Protected Area (HPA) created with 28-bit command.
48-bit command cannot remove HPA created with 28-bit command and vice-versa. Following solution is for disk supports 48-bit LBA mode only and if you have HPA greater than 127 GB.
"Some vendor-specific external drive enclosures (Maxtor) are known to use HPA to limit the capacity of unknown replacement hard drives installed into the enclosure. When this occurs, the drive may appear to be limited in size (e.g. 128 GB). In this case, one must use software utilities that use READ NATIVE MAX ADDRESS and SET MAX ADDRESS to change the drive's reported size back to its native size."
1. Power-on PC, boot and start HDAT2.
|Q7: Change of DCO Modify item is always aborted (abort command)|
A7: Some hard drives (Maxtor) allow to modify DCO always, the other
hard drives (Seagate) allow to modify DCO one times only.
Example of the restrictions on changing of bits:
If a user attempts to change maximum LBA address (SET or RESTORE) after establishing a protected area with SET MAX address, the device will abort that command.
If the user attempts to disable Security feature when the device is enabled and the Security feature is set, the device will abort that command.
If you always got an error message (aborted command) when you want to change any item in DCO Modify menu, you should first run a 'Restore' item to restore default settings and then you can go to Modify menu.
|Q8: What is Spread Spectrum Clocking (SSC)?|
A8: Spread Spectrum Clocking is a way to lower electromagnetic interference or EMI.
This is important for storage solutions that are required to pass FCC and other
agency certifications. Today, some Serial ATA disk drives implement SSC, some
allow you to turn this feature on/off, and some do not implement SSC;
it is anticipated that all will implement this feature in the near future.
The technique of modulating the operating frequency of a circuit slightly to spread its radiated emissions over a range of frequencies rather than just one tone. This reduction in the maximum emission for a given frequency helps meet FCC requirements.
Newer Serial ATA (3Gbps SATA) interface disc drives may employ a standard technology called Spread Spectrum Clocking (SSC) which helps to reduce electronic emissions (EMI) in large, multi-drive systems. Single drive environments do not need SSC to meet EMI requirements.
3Gbps means doubled interface speeds, which also means greater signal noise and electromagnetic emissions. As in the processor settings in many motherboards' BIOSes, spread spectrum clocking can reduce emissions to meet regulations.
In a single-drive environment, it's not necessary, but when you've got two or more drives, and they're all running at 3Gbps, that's when you've got a lot of electrical noise going on, and the spread spectrum feature is recommended. This is more for safety than reducing data errors, which most drives' ECC code will correct automatically.
A small number of SATA host products do not support this SSC standard feature. Similarly, RAID controllers may need to enable SSC on drive configurations with SSC disabled by default to reduce EMI.
Disable SSC: Host products that do not support SSC cannot detect the presence of the disc drive. Therefore, in order to disable SSC the drive must be attached to another host platform that does support SSC so that the feature can be disabled. Once SSC is turned off, the drive can be returned to the original host system.
Enable SSC: If the drive has SSC turned off by default and SSC is required for a large multi-drive environment, the target system is usually supported by the SSC software. RAID controllers, however, can pose a barrier to communicating with the SATA at the low hardware level required to make the SSC change. If your RAID controller is not supported then a more standard SATA system may be needed to toggle SSC on the drive. Once SSC is turned on, the drive can be returned to the original RAID controller.
There are many accounts on the Internet about problems arising from HBAs (Host Bus Adapter) not supporting SSC as required. Disk drive vendors that tried turning on SSC have had to provide consumers special programs or jumpers to turn SSC off so they will work in non-compliant systems.
Due to this problem, users believe that SATA 3Gb/s HDD's are not compatible with SATA 1.5Gb/s controllers. This is inaccurate as the technology is definitely backwards compatible.
|Q9: SATA NCQ / eSATA / xSATA|
A9: NCQ: NCQ (Native Command Queuing) debuted in many 1.5Gbps drives as a refinement of earlier
CQ schemes used in SCSI drives. When a supporting controller sends NCQ-enabled
commands to a drive, the drive will intelligently prioritize up to 32 of those
commands before performing the reads/writes. Because the controller triggers
CQ, the user can enable/disable it in the OS, as from Windows XP's Device
Manager. That applications that take advantage of the multithreading features
of dual-core and/or Hyper-Threaded processors should complement NCQ for faster throughput.
Explains Native Command Queing (NCQ) Seagate
eSATA: More of a cable and connector redesign than a fundamental change, eSATA means data cables with better shielding and connectors that are harder to accidentally dislodge or break. The external drive's power is still supplied separately. eSATA headers are rectangular instead of L-shaped, so eSATA cables won't work inside most PCs. The working group came up with eSATA to address the fact that users were already connecting SATA drives externally because the interface outpaces USB 2.0 and FireWire 800Mbps. Shielding that was adequate for use inside a computer case, wasn't good enough outside the box.
xSATA: This option allows the use of much longer external data cables of up to 8 meters in length.
|Q10: Can I cut down size of hard drive?|
A10: Yes. In 'Device List' menu select your disk drive.
Select 'SET MAX (HPA) Menu', then select 'Set Max Address'
and press Enter. Now you can choose your required size of hard drive.
It should be smaller as native (maximal) size of drive, of course.
See also question nr. 1.
|Q11: How can I determine supported media format of CD/DVD drive?|
A11: In 'Device List' menu select your CD/DVD drive.
Select 'Device Information Menu', then select 'Get Configuration'
and press Enter. Now you will see list of supported profiles of your drive.
|Q12: Portable computer with Windows Vista has problem with power consumption.|
A12: Power consumption may be slightly more than expected on a portable
Windows Vista-based computer that uses a SATA hard disk that does not support Host-Initiated Link Power Management.
This problem may occur if the SATA hard disk does not support HIPM. In this case, Windows Vista may not use DIPM for power management. Therefore, the Windows Vista power management feature is less able to efficiently manage power consumption.
|Q13: Host Protected Area (HPA) from BIOS.|
A13: Some motherboards has incorporated the HPA feature in the BIOS.
This feature allows information contained in the first partition of the Hard
Drive to be copied to a hidden HPA partition on the same drive where it is immune
If the HPA is removed from the HD the area of use will be available at the end of the drive as 'Unallocated'.
E.g. Gigabyte's Xpress Recovery.
|Q14: The Hidden Protected Area (hidden partition).|
A14: The Hidden Protected Area is a special area (hidden partition)
(usually a few gigabytes in size) located at the end of a hard disk.
It is preinstalled on the harddisks of some PC's (e.g. IBM). It is normally
hidden to the software running on this PC. It includes all the software
and data needed to recover the preloaded state of the PC.
This HPA also includes some diagnostic tools and a backup tool.
Some vendors are using the HPA instead of providing rescue media.
It is referred to as the Predesktop Area in the BIOS Setup Utility. That hidden partition is not an HPA.
|Q15: I cannot remove Host Protected Area (HPA) on Dell notebook (Media Direct HPA).|
A15: With HDAT2 program you did the first half of the fix but
missed the second part.
The Dell MBR (Master Boot Record at sector 0) calls special code in LBA sector 3 to re-enable the HPA anytime you boot from the hard disk. After you unhide the HPA, in order for it to stay unhidden you need to either get rid of the Dell MBR (so LBA-3 doesn't get called) or you need to disable LBA-3 (wipe LBA sector 3). (search on Google for 'dell hpa mediadirect')
|Q16: I cannot read SMART for USB/Firewire hard drives.|
A16: It all depends on the chip your USB/Firewire enclosures
with drive have. The protocol USB-IDE bridge between the USB and ATA
protocols should support SMART data and correctly send SMART data over
those interfaces. If you cannot see the SMART menu, your drive cannot
send SMART data.
Supported bridge chips: Cypress, JMicron and Oxford.
E.g. Western Digital Passport is using Cypress AT2+ USB/ATA interface.
|Q17: Western Digital WD5000KS doesn't spin-up (firmware bug).|
A17: Taken over from Google Notebook.
If any controller or software you have enables the "Power-up in Standby" feature on these drives, you can not disable it. In fact, once that mode is enabled, the drive reports conflicting information.
Western Digital said on the phone the KS line of drives are not a high-enough priority for them to fix the firmware.
|Q18: How to non-destructively convert dynamic disks to basic disks.|
A18: Read this instruction disk_probe.pdf.
|Q19: Hard disk doesn't spin up - PUIS (Power Up In Standby).|
A19: The optional Power-Up In Standby (PUIS) feature set allows
devices to be powered-up into the Standby power management state to
minimize current at power-up and to allow the host to sequence the spin-up
This optional feature set may be enabled or disabled via the SET FEATURES command or may be enabled by use of a jumper, or both. When enabled by a jumper, this feature set shall not be disabled via the SET FEATURES command.
Once this feature is enabled in a device, the device shall not disable the feature as a result of processing a power-on reset, a hardware reset, or a software reset.
If the device implements this SET FEATURES subcommand and power-up into Standby is enabled, the device shall remain in Standby until the SET FEATURES subcommand is received.
If the device does not implement the SET FEATURES subcommand to spin-up the device after power-up and PUIS is enabled, the device shall spin-up upon receipt of the first command that requires the device to access the media, except the IDENTIFY DEVICE command or the IDENTIFY PACKET DEVICE command.
Solution for HDAT2 program: if you have a hard disk with enabled PUIS (cannot spin up and BIOS cannot recognize this drive) run program with parameter /W Wake/Spin-up the drive:
List of parameters: HDAT2 /? or HDAT2 /h.
|Q20: Windows support for logical units larger than 2 TB.|
A20: Disk devices with more than 2 TB of disk space must be
converted to GPT format for all of the disk space to be usable.
If the device uses MBR format, the disk space beyond 2 TB will be unusable.
|Q21: GUID partition table (GPT) disks.|
A21: A GPT disk uses the GUID partition table (GPT) disk
partitioning system. A GPT disk offers these benefits:
On Intel Itanium platforms, Windows supports the use of GPT drives as boot drives or data volumes.
You can convert only empty, unpartitioned disks (raw drives or empty MBR
drives) to the GPT format. To convert a volume that contains data, you
must first manually delete the partition.
Extensible Firmware Interface (EFI) describes an interface between the operating system and the platform firmware.
Unified Extensible Firmware Interface (UEFI) http://www.uefi.org/
|Q22: Physical/Logical sector size 512 bytes or 4096 bytes (8*512 = 4 KB).|
A22: Starting in December 2009, hard disk manufacturers began
introducing disks that use 4096-byte sectors rather than the more common
512-byte sectors. Although this change is masked by firmware that breaks
the 4096-byte physical sectors into 512-byte logical sectors for the
benefit of the operating system, the use of larger physical sectors has
implications for disk layout and system performance.
(eg. "Advanced Format Technology" from Western Digital)
The physical medium is organized in 4 KB sectors but the firmware on the drive will present it as if the drive is composed of 512 byte sectors thus making the drive behave as before, so if the driver asks the hard drive to read 64 sectors from LBA 2048, the firmware will translate it and read 8 4 KB sectors from hardware sector 256. As a result, the hard drive now has two sector sizes - the physical one which the physical media is actually organized in, and the logical one which the firmware presents to the outside world.
Some of the existing BIOSs and/or drivers can't cope with drives which report 4 KB physical sector size. To work around this, some drive models lie that its physical sector size is 512 bytes when the actual configuration is 4 KB without offsetting.
Therefore the information about sector size from ATA IDENTIFY DEVICE command returns an incorrect value (eg. WD, Samsung).
|Q23: Error Page Fault when the program starts.|
A23: If you start the program HDAT2, you can get the following error:
Page Fault cr2=00400000 at eip=419; flags=3206 Eax=00000300 ebx=00330021 ecx=000000a6 edx=bfeb00bf esi=00000000 edi=00000000 Ebp=00000001 esp=00003ffa cs=87 ds=bf es=b7 fs=0 gs=0 ss=a7 error=0006
In this case you have to use another DPMI server HDPMI32.EXE.
If you are using a distribution version from HDAT2 web just type HDAT2x instead of HDAT2. It will load the DPMI server HDPMI32, run HDAT2 and then unload HDPMI32 server from memory.
If you are using another version or only single EXE file on e.g. USB device, you have to download the HDPMI32.EXE file, copy this file to your boot medium and run these commands:
To get help run 'hdpmi32 -?'.
License: HDPMI is part of the HX DOS extender runtime, which is freeware. It may be used for any purpose.