up is invalid, there is physical damage to the disk, The mirror of the physically damaged disk has also failed. Close to 10TB of data, think also headache it. After the specific data rescue work, or remind the use of asm/exadata friends, at least build a dataguard bar, just build Rong also did this share, hurriedly to read.Since the problem is very tricky, we have made the following scenario:
Extracting the database files
Try Open
If
Tags: large number of change values port Goup Note repair level assignment Use ASM to deploy large databases (10TB to PB Range) References:Deployment of very large databases (10TB to PB Range) with Automatic Storage Management (ASM) (Doc ID 368055.1) Range:This article applies to ASM configurations on all platforms. Contains the use of RAC and single-instance environments.This article applies to the creatio
OneView with AS SSD benchmarkIncludes 4 aspects of test (sequential read/write, 4K Random read/write, 64 thread 4K read/write, seek time)
As SSD's main test, but also the most common on the Internet to get test results, is its main interface on the continuous, random, access time, such as 8 related tests, as well as compression and file replication test. Let's start with a brief explanation of how each test is under the as SSD.The first is the c
4K Alignment is a very important operation when the SSD is partitioned, if there is no 4K alignment, it will result in the cross region reading and writing, not only affect the speed of solid-state drive, but also affect the SSD life. So, how do solid-state drives look like 4k aligned?
Method One: Do not use any tool to view the method
1, first use "win + r" combination shortcut key to open th
3 ways to easily get started with SSD-mounted Win7 systems
Technical analysis of "advanced format"
SSDs use "Advanced format" technology. Mechanical hard disk in the storage of data, has been the 512byte size of the sector (Sector) for the division to read and write, the hard disk industry decided to expand the sector capacity to 4KB.
Simply put, if the SSD 4K storage format is not aligned, it is possibl
One, SSD (solid State hard disk) is what side sacred
SSD is mainly divided into the following two categories:
SSD based on Flash: Flash chips are used as storage media, which is what we usually call SSDs. Its appearance can be made into a variety of touch samples, such as: Notebook hard disk, micro-hard disk, memory card, USB flash drive and other styles. The b
Lenovo ThinkPad E420 installed SSD to the CD-ROM drive bit, the BIOS can not find, PE to find SSD.
Download old peaches PE version installed to U disk, start with U disk, enter WinPE, install system to SSD hard drive, reboot, BIOS can't find SSD hard drive, so will not start SSD
This release of update patch flash STORAGE Firmware update 1.1 is mainly for the 2012 section, there was earlier user feedback that some of the model on the unknown problems caused by the data saved in SSD was erased. If the consumer discovers the problem or cannot install the update on the machine, you can replace the SSD at the local Apple Store for free.
The security bulletin is as follows:
Apple has
SSDs are structured and run differently from traditional hard drives, and are strongly recommended after purchase to achieve optimal operational performance and extend the life of the SSD. The first part of the following is some of the things you can find on the internet about SSD drives, which have been introduced a lot, We will not go into the details here. For more information, please find the relevant c
recently re-spread on the database, the company's core database every day IO full, in the study with SAS 16*RAID10, or RAID10 ssd*6, or FIO;the principle, no raid-5 for database; eh; the root of all evil ;No.2 principle, most of the time, the database does not need too high CPU, now 2 sockets are basically enough, more MySQL is not used;No.3 principle, large memory, high IO, is the necessary condition of modern web-based database;now the big companies
SSD win7 Optimization guide: nine Win7 SSD optimization methods with the price of solid-state drives falling, solid-state drives are now widely used, and some new notebooks and assembly computers are also beginning to adopt solid-state drive platforms, not to mention that the use of solid-state drives has become standard, Although the SSD is fast, but does not un
SSD Solid State hard disk installation steps
1, first SSD with 2.5 inch to 3.5-inch hard disk rack installed to the hard disk bit.
2, the boot into the BIOS, the disk mode is set to AHCI mode (basically all motherboard's default disk mode is IDE mode, this is to the mechanical hard drive to provide compatibility, but not at all suitable for SSD). Meanwhile, t
SSD potential release is the potential performance of a single-button, fully-automated, solid-state drive. Significantly enhance SSD efficiency, reduce hard disk drive read and write times, effectively increase the life of solid-state drives.SSD Potential release Features:1, only need to carry out a comprehensive physical examination of the SSD, after any file po
The following switch from Baidu:Recently in preparation for testing, you need to see which machines are mounted SSD hard drives, Google has seen a lot of methods, but all foggy, do not know how to determine. SSD hard disk seems to use the SCSI interface, so according to the name of the drive letter is not to be judged. The last group of Eric God told LSSCSI Tools, try it, very simple, the display is also ve
Today the computer finally installed, I in the Valentine's Day around Tanabata with a desktop for the development, during the period encountered some problems to share with you, I hope to help some friends.1 Buy HIMD line, all parts assembled well, I realized a problem did not buy HIMD line, my ASUS Z97-ar motherboard default Support HIMD interface, while the display supports both VGA and HIMD interface.The seller is free to send the VGA line, for me and then eggs.2 Radiator Xuan Ice 400 when I
solid-state drives, choose SLC, MLC, TLC where to go? Because the MLC structure of the flash chip price is relatively moderate, the service life and the rate is quite good, on the current market structure, most SSDs are using the MLC Flash chip architecture.Although the SLC, MLC, TLC chip architecture rate is very different, but relative to the traditional mechanical hard disk, are the quality of the soaring, so I recommend different people to use different flash chip architecture of solid-stat
1, the replacement of solid state hard drive (SSD)
First turn off the computer, then remove the mobile battery (note: There are two batteries, the inside and together), unscrew the screws, open the back cover can be opened after the image:
Only need to take away the hard drive, remove the need to unscrew a screw, and then replace the solid State Drive (SSD) can be.
2, change the memory strip
Because
Let the SSD speed fly. Solid state HDD Optimization techniques Daquan
However, the other aspects of SSDs are obvious, so it has become the necessary hardware for most users installed. In terms of usage, SSD is slightly different from the traditional HDD, and it is necessary to go through a series of settings if the SSD is to really perform its performance. F
of the computer. So we say, now the bottleneck of computer hardware is the traditional mechanical hard disk.
That being the case, we can see that improving the performance of the hard drive can improve our experience of using the computer, so SSD turned out. SSD because of its storage medium and principle and traditional mechanical hard disk is completely different, so greatly improve the read and write s
Nor and NAND
Nor and NAND are both Flash technologies. Nor is developed by Intel. It is somewhat similar to memory and allows direct access to any memory unit through an address. The disadvantage is: low Density (Small capacity), low write and erase speeds. Nand is developed by Toshiba. It features high density (Large capacity) and fast write and erase speeds. However, it can only be accessed after address conversion through a specific IO Interface, some are similar to disks.
The USB flash drive
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