[Data recovery failure description]
An HP DL380 G4 server that uses the HP Smart Array controller to mount a homemade disk array consisting of a set of 14 146G SCSI hard drives in a group of RAID5.
Operating system for Linux, built Nfs+ftp, as the company's internal file server use.
Because the room moved, the admin
corresponding disks for DISK160,,ASM disk 17 corresponding disk163, according to the first feeling is likely to be disk161 and disk161 two disk anomalies, let the room check hardware without any alarms
OS level Analysis
Omitting records unrelated to this conclusionLs-l/dev/rdiskCRW-RW----1 Oracle DBA 0x000070 1 2016 disk160CRW-RW----1 Oracle DBA 0x000073 1 2016 disk163Ls-l/dev/diskBRW-R-----1 Bin Sys 1 0
HP Server is one of the most popular low-end servers. Some server failures, such as the server hard disk is not the line, the server does not go to the system can not boot and so on is also a common server failure, and for these different failures occur data loss problem, HP Server can be data recovery? If so, what's t
After hard disk data is damaged for various reasons, can we blame ourselves?The full solution of this example is to hope that readers can quickly find the corresponding solution when the unfortunate situation occurs, so as not to waste their hard work.Of course, our greatest expectation is that you will never use the following methods! Because a complete post-event solution cannot ensure that all data is in
a disk image file, you perform compression:dd if=/dev/sda | gzip > disk.img.gzdd if=/dev/sda | bzip2 > disk.img.bz2That's good! Ghost has all the features.2. Partition cloningIf we don't want to clone the entire disk and just want to back up some of the partitions that hold the data, you'll need to clone a partition. As stated in the preliminary knowledge, partitioning is also a file under Linux. For examp
A. [install HP-UX]
B. [advanced installation]
C. Configure or change the following options:
Disks, file systems,Hostname, IP ddress,Timezone, root password,DNS server, and gateway[7] select [install continue... ] Until the system is restored
Ii. system backup/recovery methods and strategies
2.1 system backup policy
HP-UX core-OS:
This part of content mainly incl
Label:A Beijing real estate company, an HP Dl380g7 server, because of physical damage to multiple disks, resulting in raid crashes, data loss. The HP Dl380g7 server runs a Kingdee EAS system with a background of more than 40 GB of Oracle database, and the database data is very important. The HP Dl380g7 server is plugged into 8 146GB SAS disks, and each 4
) this.width=650; "src=" https://s1.51cto.com/wyfs02/M01/8C/C9/wKioL1h4fBiwu-YMAAEHz5eqgZ8481.jpg "title=" 1.jpg "alt=" Wkiol1h4fbiwu-ymaaehz5eqgz8481.jpg "/>2, analyze the cause of the failureSince the first two steps did not detect a physical failure or a bad path to the disk, it may be inferred that some disk read-write instability caused the failure to occur. Because the
HP-lefthand underlying structure details and storage disaster recovery
I. Features of HP-lefthand
HP-lefhand is a very good SAN storage that uses the iSCSI protocol to allocate space for clients. It supports RAID 5, raid 6, and raid 10. It also supports volume snapshots and dynamic volume resizing. Common models includ
restore the Vraid5 data if two disks are missing.
1. Shut down the controller and Cabinet of the EVA4100 and make the disk number a full image.
2. Use Winhex to open disks one by one and analyze disk information.
3. When analyzing each disk, it is found that RAID records exist in 1 TB and GB disks. In addition, there
improves the control of the recovery process. Generally, AUTOMATIC is used for full recovery.If the archived log file has been restored to a disk location other than the default location of the database, you must specify the FROM clause. Provides a directory for storing these files. The restoration process searches for files in this directory.Finally, open the d
. Because the user is a leader who doesn't know anything about the computer, I don't want to modify the settings too much to avoid future troubles, so I re-installed the VISTA system. All the way OK.
The new situation is that the WINPE system is suspended from the CD. However, you can start GHOST from the CD for backup. In early January, the company bought a new HP laptop (I can't remember the specific model). The hard
Back up all data on the local disk to tapeBy default, you do not need to specify the file system device number. The value is "/dev/RMT/0 m ". However, if this device does not contain tape media or you need to apply other devices, you must add the parameter "-d" and specify the device number.
# Make_tape_recovery-AVOutput result:* Creating local directories for configuration files and archive.
======= 11/28/06 14:40:15 eat started make_tape_recovery. (
Yesterday using EASYBCD software, began not to understand, hand win10 the boot removed, and later found that the computer shutdown always turned into a reboot, helpless forced shutdown. Today restarted the computer, found that the computer has been unable to open, it is understood yesterday was mistakenly deleted Win10 BCD.(memory) After booting into a prompt interface, press ESC to enter a new interface, and then press F11 to enter a system backup recovery
has been restored to the latest SCN.Use the Sql*plus RECOVER command to perform this operation.If you do not specify the AUTOMATIC option, you are prompted to specify each redo log file that you want to apply. This improves the control of the recovery process. Typically, AUTOMATIC is used for full recovery.If the archived log file has been restored to a disk loc
/wKioL1jPYSTi0WY5AADYxNNsBog495.png "height=" 367 "/>We can also use a script to restore data.RESTORE LOG [DB2] from DISK = N ' D:\DB_BACKUP\DB.trn ' with FILE = 1, nounload, STATS = ten, STOPAT = N ' 2017-03-19t21:36:01 ' G O650) this.width=650; "title=" clipboard "style=" Border-top:0px;border-right:0px;background-image:none; border-bottom:0px;padding-top:0px;padding-left:0px;border-left:0px;margin:0px;padding-right:0px; "border=" 0 "alt = "Clipboar
RMAN recovery case -- Case of full recovery error (ControlFileError) RMAN recovery case: the user encounters the following error during rman recovery: RMANrestoredatabasefromtagTAG20140923T160003; Start
RMAN recovery case -- Case
Cost a lot of effort to paste these two articles, feel worthwhile, with a computer so long also met a lot of hard disk problems, many problems are not returned. I am very sad that the loss of hard disk data is caused by human, such a number of times, there have been a period of time to read this information, previously wanted to do a "data recovery is not complet
to take the disk to the company recovery). Read-only and do not write, in the backup mirror disk operation, protect the original disk data is not damaged, safe recovery, holidays do not rest.Attached: RAID5 data recovery, raid5e
In RAID array data recovery, we often encounter simple structure such as RAID1, RAID0, RAID5 and so on array data recovery, such array data recovery is generally difficult, the data recovery success rate is higher. However, when encountering complex structure of array type, such as composite array structure raid0+1, ra
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