"Bad track" originates from a small-capacity hard drive more than 10 years ago. There was no system reservation inside the hard drive at that time. Factory, the factory will scan the hard disk in the presence of bad sectors of the track, and its location recorded in a small form, affixed to the hard disk shell, annotated "bad track list", that is often said "poor
Computer hard drive bad way is the word that we often hear, then what is the hard drive bad way? What is the cause of the hard drive bad? How to detect hard drive bad way, how to repair hard drive bad way? Please read this article.
Computer hard disk used too long will appe
first, the logical bad road repair method
1, for the logical bad way of the repair method, the commonly used software is "efficiency source large capacity HDD Inspection repair Program", the software to all Chinese-friendly interface, easy for beginners to use.
2, will download to the local hard drive "efficiency source" decompression, and then the *. ISO file burning to disc, specific burn Method Insight
Developer Rahul Singh recently listed outstanding programs and bad programs in his personal blog:ReferenceGood programs make complex things look simple; bad programs make simple things complicated.Excellent programs do not need to be explained; bad programs require a lot of comments.A good program requires more time, but less time in the future. A
SATA hard drive has a bad way to solve:
If the logic is bad, it can be repaired.
Physical bad way, basically repair also won't take long.
The general measure is: Find the hard drive bad road after repair to avoid bad spread
The hard drive is found to be repaired or hidde
1) Why is there a bad block? Because the NAND flash process cannot guarantee the reliability of the memory array in its lifecycle, bad blocks are generated during NAND production and use. The bad block feature is that when the block is programmed/erased, some bits cannot be pulled up, which may cause errors during page program and block erase operations, the corr
Bad blocks of ORACLE data files can be divided into physical and logical Bad blocks. Physical Bad blocks (or media Bad blocks) mean that the block format itself is bad, and the data in the block has no meaning. The logical bad blo
Bad blocks of Oracle data files can be divided into physical and logical Bad blocks. Physical Bad blocks (or media Bad blocks) mean that the block format itself is bad, and the data in the block has no meaning. The logical bad blo
how NAND is managed
NAND Flash Management: Samsung Flash For example, a piece of NAND flash for a device, 1 (device) = xxxx (Blocks), 1 (Block) = xxxx (Pages), 1 (P Age) =528 (Bytes) = block Size (512Bytes) + OOB block Size (16Bytes, in addition to OOB sixth Byte, usually holds at least the first 3 bytes of the OOB NAND Flash hardware ECC code).
About the OOB area, it's every page. Page size is 512 bytes of NAND per page allocated 16 bytes of OOB, and if NAND is physically 2K page, each page i
Database starts error
The code is as follows
Copy Code
sql> startup Mount Pfile= ' C:\pfile.txt '
The ORACLE routine has started.
The code is as follows
Copy Code
Total System Global area 452984832 bytesFixed Size 1291120 bytesVariable Size 201329808 bytesDatabase buffers 243269632 bytesRedo buffers 7094272 bytes
Database loading complete.
The code is as follows
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sql> Recover datab
Hard drive working sounds weird
When we were on duty, a netizen asked us when you open, run, or copy a file or program, your computer becomes slower than it used to be, and reads the disk over and over for a long time, then makes an error, or Windows prompts "unreadable or unable to write to the file," and a blue screen occurs when you have a serious problem. When you open the chassis, you can hear the hard drive read and write sound from the original "Cha Cha" friction into an abnormal sound.
1. What is bad database blocks?
First, let's take a rough look at the format and structure of the database block-The database data block has a fixed format and structure, divided into three layers of cache layer, transaction layer, data layer. When we read and write data blocks, the database will check the consistency of the data blocks to be read and written, it includes the data block type, the address information of the data block, the SCN Number
UFO said the 114th issue: "Bad" men like to go to the girls "Youku video online Watch." All say "The man is not bad, the woman does not love", this lets the good man is very unbalanced, is does a good person have the mistake? What does a woman love a bad man? Sao years, like "bad" men to go to the girls! Although the g
When I was a child, I only saw good people and bad people on TV. They also showed good news and bad news. However, when I grow up, I slowly find that in this real society, it seems that there are many good and evil reports, evil reports, or good or evil. Only the strong have good reports. just like the animal world, a race of things will survive.So sometimes I wonder if I can be honest and kind. Sometimes I
Refactoring note-the bad taste of the Code (on), restructuring the taste of the note code
This article is in the study of the summary, welcome to reprint but please note the Source: http://blog.csdn.net/pistolove/article/details/42041757
In the refactoring entry, I briefly introduced the definition, why, and when to refactor the refactoring. I think you have a good understanding of how refactoring works. But you may not know much about the
Good program and poor program good programming, bad programming release time: 2012-11-20 16:32:21| read: 2,735 viewsA good program can make complex things look simple, and a bad program complicates something that's already simple.Good procedures do not need to be explained, and bad programs require a lot of comment.Good programming takes more time, but it takes l
This article is in the study summary, welcome reprint but please specify Source: http://blog.csdn.net/pistolove/article/details/42041757
In the introduction to refactoring, the definition of refactoring, why refactoring, and when to refactor are briefly introduced. I think you've got a better understanding of how refactoring works. But you probably don't know much about the bad taste in the code. The bad t
Even if the hard disk's daily use and maintenance is good, it is possible to produce bad way (many of the reasons, such as: hard disk quality problems, etc.). Once the hard drive appears bad, people do not have to panic, I have to identify and repair the hard drive bad way to tell everyone to help us tide over the difficulties.
The hard drive's
1. Rman Backup is the default check for physical bad blocks.
2. If you want to check for logical bad blocks, you can use the following statement:
$ Rman Target/rman> backup check logical validate database;
Note that the above statement is only checked and will not be backed up.
3. If you want to perform a logical bad block check at the same time as the backup
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