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Anatomy of the Linux SCSI Subsystem__linux

device. The target processes the request and returns a response to the initiator. An initiator can represent a SCSI device in a host computer, and a SCSI target can is a disk drive, CD-ROM, tape drive, or Special device such as an enclosure service. Back to Top SCSI commands While the protocols over which SCSI are transported have changed over the years, the SCSI command set retains many of its o Riginal elements. A SCSI command is defined within a c

Backup detail on online

at some point in the database and use it to restore the system when it is out of the system. b Logical log Backup: After the logical log file is full, it must be backed up before it can be emptied, continue to use, and cause the system to crash if all the logical log files are full. In addition, the logical log records changes to the database after the last data backup, so the logical log is also used to recover the system when there is an unexpected system. 1.1 Data backup Online Dynamic Se

Exp/imp three modes-complete, user, table

Exp/imp three modes-full, user, and table ORACLE databases have two backup methods. The first type is physical backup. This method enables complete database recovery, but the database must run in the recovery mode (the business database runs in the non-recovery mode ), this method requires a large number of external storage devices, such as tape libraries. The second type of backup mode is logical backup, which is used by the business database. This m

Daily Management and Maintenance of Informix [ZT]

, the logical log records the changes in the database after the last data backup. Therefore, the logical log backup is also used to restore the system when the system encounters an accident. 5.1. Data Backup: (1) Online provides level 0, level 1, and level 2 Incremental backup;Level 0: Back up the entire database system;Level 1: Back up data that has changed since level 0 backup;Level 2: Back up data that changes after Level 1 backup;(2) Use the ontape command to back up data$ Ontape-SRun this c

Getlasterror () Return Value

configured to run in the executable program cannot be executed.1100-the actual end of the tape has been reached.1101-The tape access has reached the file mark.1102-the start of the tape or disk partition has been reached.1103-the end of a group of files is accessed by tape.1104-No data is found on the

My OS review-Overview of OS, Overview of OS Review

, memory, I/O devices, and information (data and programs). To put it bluntly, it refers to the CPU, memory, input and output device (mouse, keyboard, display, etc.), hard disk and hard disk software. The operating system encapsulates the computer hardware system and manages four types of computer resources. This is the function of the operating system. It's easy to understand. Ii. Operating System Development History The development process of the operating system is very important. It can make

Network data backup and recovery

strict management specifications, avoid misoperation as much as possible.  Class C: planned shutdown caused by insufficient resources  • Occurrence: As the business grows rapidly, more and more software, hardware upgrades, system resource expansion, and other events occur for some enterprises, occurs more frequently;  • Solution: the company plans to upgrade the system and implement local dual-host and system redundancy for the original data and system.  Category D: disasters at production site

Summary of various effective backup methods in Linux

directory on server sh3 pub to the/mnt/sh3 directory on server sh below. No password prompt 3. Using NFS to back up data between servers has certain program security issues. I will not discuss them here.       3. Back up data to other media You can back up the data to tape, ZIP drive, and JAZ drive. 1. Back up to tape Assume that you have configured and installed the t

RMAN-06172 Troubleshooting, rman-06172

of the crosscheck backup command is to check the RMAN directory and physical files. If the physical file does not exist on the media, it is marked as Expired. If a physical file exists, it will maintain Available. If the original backup set marked as Expired exists on the backup media again (for example, after the damaged disk drive is restored), crosscheck backup marks the status again from Expired back to Available. There is also a case where a RMAN-06172 error occurs when restoring from

UVa 1362 Exploring Pyramids: Multi-fork Tree traversal &DP

1362-exploring Pyramids Time limit:3.000 seconds Http://uva.onlinejudge.org/index.php?option=com_onlinejudgeItemid=8category=469page=show_ problemproblem=4108 Archaeologists have discovered a new set of hidden caves in one of the Egyptian pyramids. The decryption of ancient hieroglyphs on the walls nearby showed this caves structure is as follows. There are N caves in a pyramid, connected by narrow passages, one of the caves was connected by a passage to the outer worl D. The system of the "p

Troubleshooting Oracle Problems with 1.1.1 NBU backup

//////////////////////// Remove the cleaning strips and re-follow the configuration below.1. Remove the cleaning tape2. Re-do robot inventory, set the type of cleaning belt, put in the NONE pool, cleaning belt type and tape drive type, such as tape drive is hcart2, the cleaning belt is the "cleaning tape 2 type3. Double-click the cleaning belt, set the number of

Exp/imp three modes-full, user, table

Exp/imp three modes-full, user, tableOriginal Address http://www.2cto.com/database/201305/214019.htmlThe oracle database has two types of backup methods. The first class is a physical backup, which implements a full database recovery, but the database must be run in the back-up mode (the business database runs in non-return mode) and requires a great deal of external storage devices such as a tape library, a second type of backup as a logical backup,

5131 summation (NOIP 2015)

Title DescriptionDescriptionA narrow strip of paper tape was evenly divided into n squares, with a lattice numbering from 1 to N. Each lattice is dyed with a color colori (denoted by an integer in [1,m]), and a number numberi is written.Define a special ternary group: (x, Y, z), where z/y represents the number of the lattice on the tape, and here the ternary group requirements meet the following two conditi

Getlasterror error code! 1001-2000

already exists. 1074-the system is currently running with the latest valid configuration. 1075-the dependency service does not exist or has been marked as deleted. 1076-the current Guide is accepted as the final valid control setting. 1077-the service has not been started yet. 1078-the name is used as the service name or service display name. 1079-the account for this service is different from the account for other services running on the same process. 1080-only failed operations can be set for

Compressed and packaged command-Tar

When pulling logs today, I suddenly found several logs to be pulled, so I began to package the logs. Ls app-gateway.log.1 {4 .. 8} [the log to be intercepted is these] App-gateway.log.14 app-gateway.log.15 app-gateway.log.16 app-gateway.log.17 Tar-czvf app-gateway.log.1.0809.tar.gz app-gateway.log.1 {4 .. 8}[Use tar command to compress] App-gateway.log.14App-gateway.log.15App-gateway.log.16App-gateway.log.17App-gateway.log.18 Or use the following command: Zip-r app-gateway.log.1.0809.zip app-gat

How UNIX pipelines and redirection functions work in system backup (1)

does not have a tape drive, while the host jerry has a tape drive. Our task is to back up tom's data to the tape through jerry. Suppose we want to use the tar command to back up the/dir directory to the tape. First, modify the file/etc/hosts on tom and add the IP address of jerry: 192.0.0.2 jerry Ping jerry to check w

VERITAS NetBackup Backup Solution

systems, due to their nature of work, have certain limitations on when to back up and how long to back up. The system is light in time of work and is suitable for backup. However, this will increase the burden on the system administrator, due to mental state and other reasons, but also to the security of backup potential hidden dangers. Therefore, the backup scheme should be able to provide regular automatic backup, and the use of tape libraries and

ORACLE Backup Restore Command imp/exp

statementResumable_timeout Wait time for resumableTts_full_check perform full or partial dependency CHECK for TTSVolsize number of bytes to write to each tape volume (bytes to disk)Tablespaces List of tablespaces to exportTransport_tablespace Export Transportable tablespace metadata (N)TEMPLATE TEMPLATE name which invokes IAS mode export It's related to exp-help parameters. 1, table mode:Backs up the objects (tables) specified in a user mode. Busine

To teach you how to connect the broken wire.

. "Soil-type" twisted-pair wire connection, only applicable to the double stranded wire distance of not more than 70 meters, if the twisted pair is too long, you can use another twisted-pair repair method, the author will be described in detail below. First, repair tools The repair tool is naturally very simple due to the use of the most Earth method to repair twisted-pair wires. A mesh clamp, a roll of waterproof tape, a knife. The traditional con

Win32API Call error number and information (1000-1999)

the same process"). ADD (1080, "can only set a failed operation for the WIN32 service and cannot be set for driver").ADD (1081, "This service runs the same processing and service Control Manager.) Therefore, if the service handler terminates unexpectedly, the Service Control Manager cannot do anything "). ADD (1082, "This service has not set up a recovery program"). ADD (1083, "This service that is configured to run in the executable program cannot perform the service"). ADD (1100, "reached the

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