PE can not identify the hard drive reason:
Generally speaking, the PE can not identify the hard disk mainly has 3 kinds of reasons:
1, hard disk mode settings are not correct
Hard disk Mode settings are more common, the general hard
Now because the data is more and more large, so that our hard disk memory is not enough, so we need to add a hard disk, to increase the capacity of memory. Dual hard disk configuration is not so simple, it has a lot of attention to the place, such as power problems, as well as the main hard disk, from the disk of the p
the processing method of moving the hard disk into water:
The mobile hard drive that just soaks water is unable to receive electricity.
Now can only wait for the cold dry to try, if not, you have to change the circuit board.
The disc section is generally not broken and is well sealed. The water is estimated to be moving the
. Although the work for a long time, but good welfare, 24 hours uninterrupted electric ups, and there are arrays, hot plug, a few people do a person's things, how easy ah. And also very face, only running critical applications, not like us here, what a messy thing to do. But I know, those hard drives are very powerful, not SCSI, is SCSIII FibreChannel, like me, IDE, can mix workstation even very good.I ofte
1, hard drive data line and power cord loosening, oxidation or broken needle
Workaround: Try swapping power connectors, data cables, or ide/sata interfaces.
2, may be some motherboards turned off the SATA interface, can not find the SATA hard drive
Workaround: To open the
Many friends have previously asked if the SATA hard drive can use ghost. When using ghost to back up the system, they may have encountered this situation,
After the system is started with a floppy disk or a CD, the system is black after the ghost. EXE command is used. Does ghost not support SATA devices?
Can't we back up the system after using a SATA hard disk? T
Many catchers have asked if they can use ghost for SATA hard disks. When using ghost to back up the system, they may have encountered such a situation. After starting the system with a floppy disk or a CD, when using ghost. after the EXE command, the system is black and crashes. Does ghost not support SATA devices? Can't we back up the system after using a SATA hard disk? The answer is whether the SATA
Hard disk failure in the computer failure of the proportion is also relatively large, because the traditional hard disk is a mechanical hard disk, more susceptible to vibration or bad use caused by hard disk failure, the following editor for you to summarize some common computer ha
) directly affects the normal use of the hard disk. Today's machines support the "IDE Auto Detect" feature, which automatically detects the type of hard disk. When the hard disk type is wrong, sometimes you simply cannot start the system. It is recommended that you check the BIOS settings to see if the
the backup. When files are stored, they are written to contiguous blocks without fragmentation. This is a big job. It may be unnecessary for program partitions that do not change frequently like/usr, but it can create a miracle in the/home partition of a multi-user system. It takes the same time as the disk fragmentation of the Windows NT Server.
If the disk performance is still unsatisfactory, there are many other steps to consider, but any hardware solution that includes upgrading or purchasi
Test hard drive Bad Sectors in CentOS
Hard Disk status testing tools: smartctl, Badblocks, hdparm
You can quickly see whether the hard disk is healthy by using smartctl. The command is as follows:
[Root @ qy ~] # Yum installsmartmontools-y
Start SMART
# Smartctl -- smart = on -- offlineauto = on -- saveauto = on/dev/sd
an idle disk. Do not write new data into the partition to be restored before restoration.This data recovery software supports FAT12, FAT16, FAT32, NTFS, and EXT2 file systems, find the files in the disk after the partition/partition table is damaged or the Ghost is damaged. for deleted files, the software has a unique algorithm to restore files that are considered unrecoverable, And the Directory and file recovery results are very good; it also supports recovery of various storage media, includ
function of the low grid, so the recommended or software to the way to the low-level format of the hard disk.
Maxtor produced a low grid tool Low.exe, the software can be maxtor hard disk, in fact, this program can be applied to various brands of various models of IDE hard disk. The operation of the software is quite
remove the motherboard for observation, then found on the back of several places covered with dust, which is located in a IDE1 interface of the solder point, the accumulation of dust almost covered the solder. The dust 淸 clean, fixed the motherboard, fitted the accessories, restart the computer, successfully entered the Windows7 flagship version, everything back to normal.
Note: Dust is the computer's invisible killer, the accumulation of dust hindered the heat dissipation, easy to damage comp
Installation system can not find a hard drive solution
First of all, we find the reason from the periphery, a hard drive to work first must have a power supply, there is an IDE line with the motherboard.
Therefore, do not recognize the
disk. Here, root corresponds to/boot partition (if/boot partition is not specified separately, this root should point to the "/" partition ).
Digression (basic knowledge supplement)
Hdx, msdosy
Hd specifies the hard disk, starting with 0. hd0 indicates the first hard disk, and so on.
Msdos specifies the partition on a hard disk. Starting from 1, msdos1 indicates
, which must be based on the hard disk conditions to set up, otherwise it is likely that there will be other problems. This kind of situation is not difficult to solve, as long as the motherboard BIOS instructions and the hard disk itself, the correct settings can be resolved.
Third failure: A primary partition fails to start the hard
, you can understand C:/Documents and Settings/Administrator/local in windows.Settings/TEMP directory. Pai_^7. Set the "mount point" by yourself"In Windows, we can use "create folder" to store a class of things, of course, in Linux. In addition to this method, you can also set a "MountLoad point "(in fact, the function is equivalent to setting up a special place to store special things ")
There are many others. I will not elaborate on them one by one. The following figure shows the functions of
have built-in RAID features or has been in the BIOS to turn off RAID features, you can not load the driver, directly install the system.
Scenario four: Some motherboards from the IDE to the SATA transition period, SATA is turned off by default in the BIOS. You need to manually enable the line.
SATA interface: Serial ATA (SATA, serial Advanced Technology attachment), also known as Serial ATA, is the twin brother of serial SCSI (sas:serial attached S
Understanding SCSI Hard drives:
Every time the SCSI disk is released with a new specification, the SCSI drive then supports the new specification, making the SCSI hard drive a leader in SCSI peripherals. Since the development of hard disk technology has been quite mature, s
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