sdc acronym

applications, its stability can meet the stability requirements of individual users. In the future, Btrfs will become the default file system format in Linux. If you only use a single disk or do not need new features such as Btrfs snapshots, storage pools, and images, it is better to use the ext4 file system. Sample Environment In this example, we will use four disks for demonstration, of which two are 1 TB disks (/dev/sdb and/dev/sdc respectively ),

1. First add three Disks 2. Installation Package [Root @ myorcl asm] # ls Oracleasm-2.6.18-348.6.1.el5-2.0.5-1.el5.i686.rpm Oracleasm-2.6.18-348.6.1.el5debug-2.0.5-1.el5.i686.rpm Oracleasm-2.6.18-348.6.1.el5PAE-2.0.5-1.el5.i686.rpm Oracleasm-2.6.18-348.6.1.el5xen-2.0.5-1.el5.i686.rpm Oracleasmlib-2.0.4-1.el5.i386.rpm Oracleasm-support-2.1.8-1.el5.i386.rpm 3. view 3 Disks [Root @ myorcl asm] # fdisk-l Disk/dev/sdb: 21.4 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cyl

, multiple disk partitioning groups can be made into a storage pool where the administrator can create logical volume groups on the storage pool and mount them to the corresponding mount points, thus achieving the purpose of dynamically increasing disk space. For example, when the/home partition is not large enough, you can mount a portion of the disk to home/home, so that you can achieve zero-time to adjust the disk.Before starting the LVM configuration, briefly describe a few basic concepts an

Problem situation: Using AWS EC2 Server, mount a disk, umount the mounted directory on the system, and then cancel the attachment of the disk in the AWS Admin interface, the process took a long time and the period state was buzy, but after a while it succeeded in canceling the attachment, However, the use of Fdisk on the system to view the disk still exists but is not available, see below: [root@ip-10-150-125-190 ~]# Fdisk-l disk/dev/sda1:10.7 GB, 10737418240 bytes255 heads, Sectors/track, 13

the file last accessed. The cost of this operation is actually very large, for example, I just open a file does not write any of the file, will cause the system to the bottom of the disk at least one write operation. For u disk, the update of access time is also an important factor in reducing performance and wearing a U disk. This time is of no practical use for ordinary applications, so we can put it off. (There are a few programs that rely on last access time to make some special judgments,

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' hwhandler= ' 0 ' WP=RW'-+-policy= ' round-robin 0 ' prio=1 status=active|-6:0:0:1 SDC 8:32 active ready Running # Here you can see that the devices are Active Status'-5:0:0:1 SDB 8:16 active ready Running # Here you can see that the devices are Active Statusanalog NIC failure, verifyingMultipathof theFailoverfunction# Ifdown Eth2 # wait a few seconds after execution to let DM confirm that the IP Path Down offDevice State:3 (Disconnected)# MULTIPAT

1. Disk Management#提示没有partprobeYum-y Install parted#新硬盘新建分区 and change the type to Linux Raid AutoDetect#非交互方式, note that there is a enter key between 1 and TFDISK/DEV/SDE Fdisk.txt:NP11TFdW#新建分区, note that there is a return enter between 1 and WFDISK/DEV/SDF Fdisk.txt:NP11WQ#将磁盘格式化为ext4文件系统Mkfs.ext4/dev/sde#2. Radi Management#以两块硬盘做raid0,-l0 says Raid0,-n2 says raid with 2 hard drives#-a answer all prompts for YesMdadm-c/dev/md0-a YES-L0-N2/DEV/SDB/DEV/SDCmdadm-a Yes--create/dev/md0-v--raid-de

Using Fdisk partitioningView the mounted hard drive with the fdisk-l command, assuming that the/DEV/SDC# fdisk-l...disk/dev/sdc:10.7 GB, 10737418240 bytesHeads, Sectors/track, 10240 cylinders, total 20971520 sectorsUnits = sectors of 1 * MB = bytesSector size (logical/physical): bytes/512 bytesI/O size (minimum/optimal): bytes/512 bytesDisk identifier:0x00000000DISK/DEV/

1, creating a logical volumeView Physical Disk:[[emailprotected]~]#parted-l|grep ' Disk/dev/s ' # If the partition table is gpt[[emailprotected]~]#fdisk-l|grep ' Disk/dev/s ' #如果分区表是MBRDisk /dev/sda:214.7GB,214748364800bytes,419430400 Sectorsdisk/dev/sdc:21.5gb,21474836480bytes,41943040sectorsdisk NBSP;/DEV/SDD:NBSP;21.5NBSP;GB,NBSP;21474836480NBSP;BYTES,NBSP;41943040NBSP;SECTORSDISKNBSP;/DEV/SDB: 21.5gb,21474836480bytes,41943040sectors[[emailprotec

1. Edit the/etc/scsi_id.config file, if the file does not exist, create the file, and add the following line:Options=–whitelisted–replace-whitespace2. Get the disk UUID that needs to be bound to ASM disk, for example we want to use/DEV/SDC and/DEV/SDD as ASM disks, then:#/LIB/UDEV/SCSI_ID–WHITELISTED–REPLACE-WHITESPACE–DEVICE=/DEV/SDC1ata_vbox_harddisk_vb36a9e548-1838194a#/LIB/UDEV/SCSI_ID–WHITELISTED–REPLACE-WHITESPACE–DEVICE=/DEV/SDD1ata_vbox_harddi

1.Scene2.PocEnvironment650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/45/DF/wKioL1PstwTRnJXLAACSFsCm8UU725.gif "title=" 1.gif " alt= "Wkiol1pstwtrnjxlaacsfscm8uu725.gif"/># uname-aLinux localhost 3.10.0-123.el7.x86_64 #1SMP Mon June 12:09:22 UTC x86_64 x86_64 x86_64 gnu/linux# Cat/etc/redhat-releaseCentOS Linux release 7.0.1406 (Core)3.Specific Operation3.1. Partitioning# fdisk-ldisk/dev/sdc:32.2 GB, 32212254720 bytes,62914560 sectorsUnits

cylindersUnits = Cylinders of 16065 * 8225280 bytesDevice Boot Start End Blocks Id System/DEV/SDA1 1 4 32098+ de Dell Utility/DEV/SDA2 * 5 2554 20482875 7 Hpfs/ntfs/dev/sda3 2555 7904 42973875-up Linux/DEV/SDA4 7905 8924 8193150 f Win95 Ext ' d (LBA)/dev/sda5 7905 8924 8193118+, Linux swapdisk/dev/sdc:40.0 GB, 40007761920 bytes255 heads, Sectors/track, 4864 cylindersUnits = Cylinders of 16065 * 8225280 bytesDevice Boot Start End Blocks Id System/DEV/

1, in VMware add space to the root partition509 cd/sys/class/scsi_host/ See if the added drive information is in the system521 echo "---" >/sys/class/scsi_host/host0/scan loading hard disk information522 echo "---" >/sys/class/scsi_host/host1/scan523 echo "---" >/sys/class/scsi_host/host2/scan524 ls/dev/sd* To see if the information was loaded successfully525 PVCREATE/DEV/SDC Create a physical volume526 Vgextend VG_CCMSDZHKJR/DEV/

A bare device is a special character device that is not formatted with a partition or disk, also known as a bare partition (the original partition), and is not read by UNIX through the file system. It is the responsibility of the application to read and write it. A device that is not managed directly by the operating system without the buffer of the file system. I/O is more efficient because it spans operating system management. If Oracle 10g RAC is installed on SuSE Linux 10, the bare device mo

Tags: extended for physical ble checked Ted SSI byte desFirst, view the new disk[Email protected] desktop]# FDISK-CUL/DEV/SDCdisk/dev/sdc:21.5 GB, 21474836480 bytes255 heads, Sectors/track, 2610 cylinders, total 41943040 sectorsUnits = sectors of 1 * MB = bytesSector size (logical/physical): bytes/512 bytesI/O size (minimum/optimal): bytes/512 bytesDisk identifier:0x00000000Two Add logical partitions[Email protected] desktop]# FDISK-CU/DEV/SDCDevice c

dm_round_robin[Email protected]:~#Eight, after the installation configuration is successful, you can see that Multipath manages a multipath device called MPATHN, which contains two paths. [email protected]:~# multipath-ll #user_friendly_names Yes (alias setting)Mpatha (36505dac1002fc54b1ee508f200000048) dm-0 HUAWEI,XSG1size=200g features= ' 0 ' hwhandler= ' 0 ' wp=rw'-+-policy= ' round-robin 0 ' prio=1 status=active|-12:0:0:1 SDB 8:16 active ready running'-13:0:0:1