If your disk is not shown, you get Device is not ready or This drive does not support LBA mode or not detected you may need to go into the BIOS settings and set the SATA controller mode to ATA or Legacy. Don't forget to set it back again afterwards or the computer may not boot. One can feel a slight vibration upon touching the hard drive, and if the vibration is not there, the hard disk is not detected or did not start. If you cannot determine whether the drive is spinning or not while fixing the scenario where the hard disk is not detected, here are a few steps: Boot the computer and try to catch some noise.
Hello,
Well I have Seagate 250GB HDD which was dead due to logical board(PCB) Failure.
Specs of the PCB
PCB Number: 100468303 REV A
Smooth Chip number: 100369972
BIG CHIP number: TTB5041A0
I found the same PCB and ordered it. I was advised by the seller that the ROM chip needs to be replaced for the device to be working correctly.
I first swapped the PCB without replacing, the drive started spinning but was not detected in BIOS.
Now i had the ROM chip replaced from paitent PCB to the donar PCB the drive gets recognized in BIOS but not in OS.
I tried Computer Management in OS - No go
Tried Parition Magic - Not detected here (not as RAW drive either)
Tried Windows 7/Windows Vista bootable disc so that it may get detected during installation - No Go
I tried Seagate Seatools for DOS - The drive gets detected there.
There is important data on the drive which I need to be recovered. Now how do i go about making the drive detectable in the OS ? Any advanced data recovery tool that can detect the HDD for a bootable media ?
My idea: Use one of those Ultimate Bootable discs or Hard drive utilities to disc and if it is detected format the HDD using NTFS (quick format). Once the HDD is detected in the system, try the recovery process . What do you have to say about that ?
Well I have Seagate 250GB HDD which was dead due to logical board(PCB) Failure.
Specs of the PCB
PCB Number: 100468303 REV A
Smooth Chip number: 100369972
BIG CHIP number: TTB5041A0
I found the same PCB and ordered it. I was advised by the seller that the ROM chip needs to be replaced for the device to be working correctly.
I first swapped the PCB without replacing, the drive started spinning but was not detected in BIOS.
Now i had the ROM chip replaced from paitent PCB to the donar PCB the drive gets recognized in BIOS but not in OS.
I tried Computer Management in OS - No go
Tried Parition Magic - Not detected here (not as RAW drive either)
Tried Windows 7/Windows Vista bootable disc so that it may get detected during installation - No Go
I tried Seagate Seatools for DOS - The drive gets detected there.
There is important data on the drive which I need to be recovered. Now how do i go about making the drive detectable in the OS ? Any advanced data recovery tool that can detect the HDD for a bootable media ?
My idea: Use one of those Ultimate Bootable discs or Hard drive utilities to disc and if it is detected format the HDD using NTFS (quick format). Once the HDD is detected in the system, try the recovery process . What do you have to say about that ?
The drive is recognized in BIOS but does not show at all in W10 Disk Management. I've read other discussions that the drive may show in DM and the fix is to simply change the drive letter, but DM only shows my primary drive as Disk 0 then my USB drives. No 2nd hard drive. I've also started in Safe Mode but have the same issue, no 2nd hard drive. Dec 19, 2019 There are various reasons why a CD or DVD drive is not detected. The resolutions that are listed in this article may help solve some instances but not all instances of this problem. You may also need to contact your hardware manufacturer for assistance with your hardware.
Copyright and Disclaimer
This manual cannot be sold or published anywhere. As I am trying to make it useful,it is much better to give a link to this page instead of copying something from here.
You may distribute MHDD without any limitations while you preserve copyrights.You can disassemble (reverse-engineer) MHDD for educational purposes.You cannot sell MHDD program or any its part.
Ford 8210 tractor service manual. © 2005 Dmitry Postrigan
DISCLAIMER:Use this software as is. MHDD is powerful, but very dangerous program and nobody isresponsible for any damage or data loss made by MHDD.
Contents
- Welcome to MHDD
- Using MHDD commands
About the MHDD project
MHDD is the small and powerful freeware tool to work with hard drives at the lowest possible level.First version was released in 2000 by me, Dmitry Postrigan. It was able to make surface scan ofan IDE drive in CHS mode. My main objective was to develop well-known and trusted HDD diagnostic tool.
Now MHDD is much more than just diagnostic.You can do anything with MHDD: diagnose your drive, access raw sectors, manage S.M.A.R.T. (SMART) andother drive parameters such as acoustic management, security, Host Protected Area.You can even send your own commands to a drive using very simple linear scripting engine.
Getting MHDD
When you need fresh copy of MHDD, please always use http://mhdd.comwebsite. You can get MHDD as CD image, as self-extracting floppy image or as archive.
Documentation is web-based to make it always up-to-date.
What is inside of MHDD package
After the first run log/mhdd.log file will be created automatically.This is the main log file, everything is logged there.If you download and extract a boot floppy or CD image you will have DR-DOS system files too.
How it works
Let's imagine how MSDOS works when it needs to read a sector from a drive —it simply asks the BIOS to do that.Then BIOS looks into its tables to find where that drive is attached, checks ranges and thenstarts sending commands to the drive. After everything is done it returns result to MSDOS.
Just look at this. This is a typical diagram how generic DOS program talks to the drive.
And now how MHDD works:The main difference: MHDD does not use BIOS functions and interrupts. So,you even do not need to detect your drive in BIOS. You can even turn on your drive after MSDOS boots.MHDD works directly with IDE or Serial ATA controller so it does not careabout partitions, file systems, BIOS (motherboard) limitations, etc.
WARNING:Do not run MHDD from the hard drive which is on the same physical IDE channel (cable) whichyou are going to use to diagnose drives! MSDOS (SMARTDRV.EXE, for example) may decide toaccess any drive at the same moment when MHDD is using it, you willhave some data loss on both devices on that channel! There is no way to block or trace MSDOS'or BIOS' read/write attempts. That is why, by default, MHDD does not work withPrimary IDE as it usually used to boot MSDOS, to run MHDD, etc. To unblock Primary IDE please runMHDD once, then exit, and then modify MHDD.CFG or use /ENABLEPRIMARY switch.
For SCSI drives MHDD uses DOS ASPI driver. If you are not planning to use MHDD on SCSI drivesthen you do not need any drivers.
Platform requirements and supported hardware
Platform:
- Intel Pentium or higher CPU
- 4 megabytes of RAM
- DR-DOS, MSDOS version 6.22 and higher
- Any boot device (USB, CDROM, FDD, HDD)
- A keyboard
- Any integrated into motherboard north bridge (addresses: 0x1Fx for primary channel, 0x17x for secondary channel)
- AHCI controllers, however, not all - if yours is not recognized, try switching it to the IDE mode (sometimes also called Legacy Mode). This can be done in BIOS Setup.
- PCI UDMA boards (detected automatically): HPT, Silicon Image, Promise, ITE,ATI and so on. Even some RAID boards are supported. In this case MHDD works witheach physical drive separately
- UDMA/RAID controllers integrated into motherboard as additional chip
- Any IDE or Serial-ATA drive with size bigger than 600Mbytes, in other words,LBA mode is supported in full. This is because I have removed whole CHS code since version 2.9
- Any IDE or Serial-ATA drive with size lower than 8388607 TBytes, in other words, LBA48 mode is supported in full
- Any SCSI drive with sector size 512—528 bytes
IDE drive should operate in master mode, and no slave devices should be attached.Please configure all drives you are planning to work with as master devices.
Other devices
- Any SCSI removable media such as tape, CDROM. Maximum sector size for such devices is 4096 bytes
Obtaining installation package
You have to decide which kind of installation you prefer: CD image, floppy image or just executable files.Please visit http://mhdd.com.
You can burn CD image with any CD burning software. Your CD will be bootable.
Floppy image can be written under Windows 2000/XP.
You may also decide to obtain just executables. You will have to extract MHDD files somewhere.
First run. Some important information
Some people believe that MHDD is very difficult. This is because they suppose MHDDshould be very simple and easy, «one-button» software, and when they run itfor the first time they become disappointed. MHDD is not easy if you haveno deep knowledge how disk drives work.If you want to get such knowledge you can use ATA/ATAPI standard:http://t13.org.
It is very important to understand that you have to spend several hours (minimum) before youwill start understanding results made by MHDD. I strongly recommend trying a couple of good driveswith MHDD before you start working with bad drives.
On the first run MHDD creates a new ./cfg/mhdd.cfg file. Primary IDE channel is disabled by default.If you really want to enable it, please read this(look for warning message).
You will see drive selection menu. Please select any device you want. You can alwayscall this menu by pressing SHIFT+F3.
Now you can press F1 and use whatever commands you want.Please be extremely careful when running MHDD first times.
Best commands to try first are EID, SCAN, STOP, CX and TOF. Some of them have shortcuts,for example F4 for SCAN.
Please also take a look at the registers. Any IDE/SATA drive should reportDRIVE READY and DRIVE SEEK COMPLETE, so you will see DRDY and DRSC flags colored in blue.BUSY appears when drive has something to execute (read or write command, for example). Some flagssuch as WRITE FAULT and TRACK 0 NOT FOUND are obsolete, they never should appear. INDEX flag isobsolete too, but sometimes it can blink. DATA REQUEST (DREQ) flag is on when drive wants to receiveor to send some data from/to the PC.
When you see ERROR flag (ERR) you can look at the error registerwhere you can see what kind of error happened. See ATA/ATAPI standardfor more information about registers and commands.
Scanning a drive
Scanning of any device is possible only if it can be detected by ID/EID commands(or F2 key). To scan a drive type SCAN and press ENTER or use F4 key.You will see menu where you can adjust some settings. By default, start LBA is zero andend LBA is maximum possible value (last sector of the drive). Alls power cycle.
Security commands
Use PWD command to lock a drive with defined user password.According to ATA/ATAPI standard, you have to repower thedrive to make password setting active.
There are two commands to unlock drives: UNLOCK and DISPWD.UNLOCK just unlocks a drive till the next power cycle. To disable password you have toUNLOCK drive first, then use DISPWD command to disable the password. You have to know the passwordto use unlock or disable password commands. UNLOCK and DISPWD will ask you which kind of passwordyou will enter: master or user. For example, PWD command sets USER password.
Master password is set by manufacturer and can be used to unlock a drive.
Reading sectors to a file
You can read several sectors or whole drive to a file or to set of files. Just run TOF command,there is nothing difficult. MHDD skips bad sectors, if any. If you are planning to get more than1 GB, it is better to use ATOF command (it just creates several files instead of one).
Writing sectors from file to the drive
Use FF command to write sectors to the drive. It will ask you the number of the first LBA sectorto write and how many sectors to write.
Acoustic Management
Almost all modern drives support Acoustic Management. You can decrease noise produced by heads byincreasing seek time. Use AAM command to adjust the noise.
Device Configuration
You can view and change current drive configuration by using CONFIG command. It will allow you toview or set the maximum UDMA mode, Security support, SMART support, LBA48 mode support,AAM and HPA support etc. You can also cut or uncut the drive by using this command. Some manufacturersare using Device Configuration to reduáe the size of a disk.
Batches
You can write a simple batch file (see an example in BATCH directory) where you can describe«what to do». Press F5 to run a batch.
Other MHDD commands
Mhdd Not Detecting Drive Time
Press F1 to find more MHDD commands to play with. Also it is a very good idea to use command MANto get more detailed help on each command. Good luck!
Mhdd Not Detecting Drive Free
Command line switches
Mhdd Not Detecting Drive Mac
Frequently Asked Questions
FAQ is available here:http://forum.hddguru.com/viewtopic.php?t=5
Editor: Maya Postrigan
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