1, if the bad way less, we can use MHDD software to shield the bad, can get unexpected results, the following take my wd500g notebook as an example, hard drive bad road shielding
2, this is my notebook in the recent situation, the boot of the hard drive self-test, the hard drive self-test has been difficult, need to press the space bar before the sel
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
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
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
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
This article is in the study summary, welcome reprint but please specify Source: http://blog.csdn.net/pistolove/article/details/42083495
In the refactoring note-the bad taste of the code (above) describes 11 of the 22 bad flavors, this article will introduce the remaining 11 bad flavors. The reason why it is divided into two articles, is because an article intro
Tags: Oracle bad blockThe occurrence of bad blocks is rare, but the production system occasionally appears. If there is a physical backup, the processing is relatively simple, directly block-level recover can be, but if only a logical backup? There are four kinds of cases to deal with, and here's a summary:One, the data part of the block is broken, when the SQL execution scan to this block will be reported
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
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
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
Copy Code
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.
MHDD is a Russian maysoft company produced professional hard disk tool software, with a lot of other hard disk tool software can not match the powerful features, now professional hard disk repair personnel with or MHDD this software, this shows MHDD powerful computer use for a long time, hard disk will appear a variety of problems, The most common problem is hard drive bad path, then the hard disk has the main manifestation of
Original: http://www.talkwithtrend.com/Article/216335 PrefaceThe most serious failure of a database is database corruption. Database Bad page is a kind of database corruption, if there is data page corruption in the database, when the bad page is not accessed, the database can provide the service normally, when using the table with the bad page, it can cause the
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
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
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