Data recovery base – 9. MHDD software tools

1.4.3 HDD detection software MHDD

In many cases, we need to be performed prior to the analysis of data recovery or physical integrity test drive to determine the location of bad sectors and bad sectors if it exists, in order to take appropriate measures under the circumstances. Russia Maysoft company produced MHDD is a more commonly used hard drive detection software.

_{EXIT (hotkey}_{Alt + X)}_:_{exit to}_DOS.

_{QUIT (hotkey}_{Alt + X)}_{: exit to}_DOS.

_{HELP (hotkey}_{F1): help.}

_{BATCH (}_hotkey_F5₎_{: Batch.}

_{CLS: Clear the screen.}

_{SCREENSHOT: screenshot.}

_{PORT (}_hotkey_{Shift + F3}₎_{: Select the port and disk.}

_{PCISCAN: save}_{PCI bus information.}

_{WAIT: wait for the hard drive in place.}

_{Scsiinfo (F9):}_{SCSI device information.}

_{MAN: Detailed view command.}

_ID:_{obtain disk information, including hard disk capacity, number of heads, sectors,}_SN_{Serial Number,}_Firmware_{firmware version number,}_LBA_{values, supports}_DMA_{level, whether to support the}_HPA_{, whether to support}_AAM_,_SMART_{switch status, level and safe mode switch status, etc.}_).

_{SCAN (hotkey}_{F4): disk scan can be used to repair bad sectors specific pattern. Which -}

u [Remap: On / Off] (re-image): whether to repair bad sectors.

u [Ending LBA]: LBA value is set to terminate the scan.

u [Timeout (sec)]: Set the timeout value from 1 to 200, the default value is 30.

u [Standby after scan]: Turn off the hard drive motor, so you can make the SCAN scan after the end of the scan, the hard drive can automatically cut off the power supply, but the host is powered (belonging unattended function).

u [Loop the test / repair]: loop detection and repair, mainly used repeatedly to repair bad sectors stubborn.

u [Erase WAITs] (deleted wait): This is mainly used to repair bad sectors, and repair is more effective than REMAP ideal, especially for the most effective IBM hard disk bad sectors, but pay attention to where the data is being restored to destroyed. Erase WAITS time default is 250 milliseconds, the value can be set to range from 10 to 10,000. To set the default time, you can open MHDD.CFG file / CFG directory, modify the project to change the Erase WAITS value. This value is mainly used to set the value of reading time MHDD determine bad sectors (ie read a sector block if the reading time reaches or exceeds this value, the block is considered as bad sectors, and start trying to fix), general the case, do not change this value, otherwise it will affect the effect of defining and repair bad sectors.

u left part of the screen is the status register of the first row, the right part of the error register. The first line in the middle of the screen (between BUSY and AMNF) there is a blank area, if the hard disk is added to the password displayed here PWD; If the hard done by HPA shear displayed here HPA.

u left part of the second line of the physical parameters of the current hard disk, while the right half position is currently being scanned.

u lower right corner of the screen as a timer, Start indicates the start of the scan time, Time indicates elapsed time, End said it expected the end of time, will be displayed after Time Count, said total spent much time.

u When the scan, each square represents 255 long-sectors (in the LBA mode) or on behalf of 63 sectors (in the CHS mode).

u scanning process can be terminated at any time by pressing the Esc key.

u said box from top to bottom from normal to abnormal, read and write speed from fast to slow. Under normal circumstances, should appear only the first and second gray box.

u If the light gray box (third box) appears, it means there are more time-consuming to read.

u If the green and brown box (the third and fourth box) appears, read here represents an exception, but has not yet produced bad sectors.

u If a red box appears (the sixth and final one box), it means difficult to read here, going to produce bad sectors.

u If there is a question mark (?), said here read errors, serious physical bad sectors, can not be repaired.

u Use the arrow keys when scanning the flexibility to control the scanning process, much like the VCD player: ↑ back 2%; ↓ Fast forward 2%; ← Back 0.1%; → Fast forward 0.1%. Flexible use arrow keys can be unstable, bad sectors stubborn repeatedly scan and repair sector.

_SWITCHMBR_:_{Clear or write}_MBR_{'s "}_55AA_{"signature logo.}

_HPA_:_{Hard disk capacity cut function can reduce the capacity of the hard drive, make}_BIOS_{detection capacity decreased, but the}_DM_{is independent of the kind of}_BIOS_{software to detect hard disk capacity will still show the original hard drive capacity.}

_NHPA_:_{restore the true capacity of the hard disk capacity.}

_RHPA_:_{Ignore capacity cut, showing the true capacity of the hard disk.}

_RX_:_{Receive data from the cache.}

_{RST (F3)}_{: Reset the drive.}

_PWD_:_To_ATA_{hard drive plus}_USER_{password, up to}₃₂_{-bit, enter nothing to cancel. The hard disk is locked completely unable to read and write, low-level formatting, partitioning and all read and write operations are invalid. If you add a password successfully, press}_F2_{key after you can see}_Security_{behind a red}_ON_{. Note that you must turn off the power after you set a password and then power will make the password work.}

_UNLOCK_:_{Unlock the hard drive. First select}_{0 (USER)}_{, and then enter the correct password, the hard drive before restarting unlocked, password remain valid after the restart. Note: Select}_{1 (Master)}_{can not unlock the password.}

_DISPWD_:_{permanent lifting password, first select}_{0 (USER)}_{, then enter the correct password. Using}_DISPWD_{before it must first use}_UNLOCK_{unlock command.}

_RPM_:_{Measuring hard disk speed.}

_FF_:_{from an image file}₍_maximum_2GB)_{recovery of the sector segments.}

_AAM_:_{Automatic noise management. You can use the}_{AAM (}_{Automatic Noise Management}₎_{Command "had heard that the resulting" style to adjust the hard drive noise. Press the}_F2_{key if there}_AAM_{words, it means that the hard drive supports noise regulation. Type the}_AAM_{command will display the current hard disk noise level, and can immediately hear the hard disk read and write noise.}

_Enter_AAM_{command -}

u press the 0 key to close the AAM function.

u Press the M key to the noise to the minimum (lowest performance).

u Press the P button can be adjusted to the maximum noise (highest performance).

u press the plus sign (+) and minus (-) can freely adjust the hard drive noise value (values range from 0 to 126).

u Press the L key to get the noise and the median performance (on some drives if you press the plus and minus invalid, but do not want the noise level is the maximum or minimum, you can press the L key to take the noise in the middle value).

u Press the D key to turn it off AAM function.

u press the Enter key to indicate the end adjustments.

_Makebad_:_{artificially create bad sectors within a specified area. Generated by it is difficult to repair bad sectors.}

_RANDOMBAD_:_{randomly generated in various parts of the hard disk bad sectors, press}_Esc_{key to stop generation. Generated by it is difficult to repair bad sectors.}

_INIT_:_{hard disk initialization, including}_{Device Reset (}_{the hard reset}₎_,_{Setting Drive Parameters (}_{set hard disk parameters}₎_,_{Recalibrate (}_{recalibration}₎_.

_FDISK_:_{fast and hard into an area marked as}_FAT32_format₍_{actually just write an}_MBR_{master boot record}₎_{, and can be set to boot, but need to be used with the}_FORMAT_format.

_{SMART (F8)}_:_Show_SMART_{parameters and can be}_SMART_{conduct various related operations.}_{SMART ON}_{can open the}_SMART_function,_{SMART OFF}_{can turn off the}_SMART_function,_{SMART TEST}_can_SMART_testing.

_STOP₍_hotkey_{Shift + F4)}_{: Turn off the hard drive motor.}

_I₍_hotkey_F2₎_:_simultaneous_ID_{command and the}_INIT_command.

_ERASE_:_{certain sector or the entire disk cleared.}

_TOF_:_{create an image file for the specified sector segment}₍_maximum_2GB)_.

_FASTERASE_:_{quickly cleared the entire disk.}

_CLRMBR_:_{Backup and clear}_MBR_.

_CX_:_{seek testing.}

_EID (_hotkey_{Shift + F2)}_{: Get Device complete information.}

_ATOF_:_{read a few sectors and saved to file.}

_MAKELOG_:_{test drive and create detailed logs.}

_CONFIG_{: configure the drive.}

_SETCDSPEED_:_{changing the drive speed}₍_{only for}_IDE_{hard drives efficiently}₎_.

_UnitSize_:_change_SCSI_{sector size.}

_SCSIFORMAT_:_Formatting_SCSI_drives.

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