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This article mainly introduces "how to view Raid disk array information under linux". In daily operation, I believe that many people have doubts about how to view Raid disk array information under linux. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubt of "how to view Raid disk array information under linux". Next, please follow the editor to study!

The method of viewing raid disk Array Information under linux

The following is the information found when setting up the server raid. Take notes. If you are not interested, please ignore it.

The method of viewing soft and hard raid information under linux.

Software raid: can only be viewed through the linux system itself

Cat / proc/mdstat

You can see the raid level, status and other information.

Hardware raid: the best way is to view it through the installed raid vendor's management tools, including cmdline and a graphical interface. For example, the hardware card of adaptec can be viewed by the following command:

# / usr/dpt/raidutil-l all

You can see very detailed information.

Of course, more often than not, there are no corresponding management tools installed, so we can only rely on linux itself. Generally speaking, there are two ways I know:

# dmesg | grep-I raid

# cat / proc/scsi/scsi

The information displayed is about the same, raid manufacturer, model, level, but can not view the information of each hard drive.

In addition, after the actual test, the server of dell can be displayed through the command, while the server of hp, ibm and so on can not be displayed by the command above. Dell can only be viewed by installing the hardware manufacturer's management tools. Bmc can be viewed.

Cat / proc/scsi/scsi

You can see that it is a device on the scsi. You can generally see the raid level. Lspci can see the model of the raid card.

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Rpm-ivh megacli-1.01.09-0.i386.rpm

The command uses:

Megacli-ldinfo-lall-aall check raid level

Megacli-adpallinfo-aall to check raid card information

Megacli-pdlist-aall to view hard disk information

Megacli-adpbbucmd-aall to view battery information

Megacli-fwtermlog-dsply-aall View raid card log

Introduction of common parameters of megacli

Megacli-adpcount [displays the number of adapters]

Megacli-adpgettime-aall [display adapter time]

Megacli-adpallinfo-aall [shows all adapter information]

Megacli-ldinfo-lall-aall [displays all logical disk group information]

Megacli-pdlist-aall [displays all physical information]

Megacli-adpbbucmd-getbbustatus-aall | grep 'charger status' [check charging status]

Megacli-adpbbucmd-getbbustatus-aall [display bbu status information]

Megacli-adpbbucmd-getbbucapacityinfo-aall [display bbu capacity information]

Megacli-adpbbucmd-getbbudesigninfo-aall [display bbu design parameters]

Megacli-adpbbucmd-getbbuproperties-aall [Show current bbu properties]

Megacli-cfgdsply-aall [displays raid card model, raid settings, disk related information]

The change in the state of the tape, from pulling the disk to inserting the disk.

Device | normal | damage | rebuild | normal

Virtual drive | optimal | degraded | degraded | optimal

Physical drive | online | failed-> unconfigured | rebuild | online

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Common usage of megacli

2008-10-24 09:32

1. Prepare

The new version of megacli-1.01.24-0.i386.rpm installs the program under / opt, and you can customize the installation directory, such as:

Rpm-relocate / opt/=/usr/sbin/-I megacli-1.01.24-0.i386.rpm

Replace the installation directory / opt with / usr/sbin.

View all physical disk information

Megacli-pdlist-aall

Adapter # 0

Enclosure number: 1

Slot number: 5

Device id: 5

Sequence number: 2

Media error count: 0

Other error count: 0

Predictive failure count: 0

Last predictive failure event seq number: 0

Raw size: 140014mb [0x11177328 sectors]

Non coerced size: 139502mb [0x11077328 sectors]

Coerced size: 139392mb [0x11040000 sectors]

Firmware state: hotspare

Sas address (0): 0x5000c50008e5cca9

Sas address (1): 0 × 0

Inquiry data: seagate st3146855ss s5273ln4y1x0

... ..

2. View disk cache policy

Megacli-ldgetprop-cache-10-a0

Adapter 0-vd 0: cache policy:writeback, readaheadnone, direct

Or

Megacli-ldgetprop-cache-L1-a0

Adapter 0-vd 1: cache policy:writeback, readaheadnone, direct

Or

Megacli-ldgetprop-cache-lall-a0

Adapter 0-vd 0: cache policy:writeback, readaheadnone, direct

Adapter 0-vd 1: cache policy:writeback, readaheadnone, direct

Or

Megacli-ldgetprop-cache-lall-aall

Adapter 0-vd 0: cache policy:writeback, readaheadnone, direct

Adapter 0-vd 1: cache policy:writeback, readaheadnone, direct

Or

Megacli-ldgetprop-dskcache-lall-aall

Adapter 0-vd 0: disk write cache: disk's default

Adapter 0-vd 1: disk write cache: disk's default

3. Set disk cache policy

Cache policy explanation:

Wt (write through

Wb (write back)

Nora (no read ahead)

Ra (read ahead)

Adra (adaptive read ahead)

Cached

Direct

Example:

Megacli-ldsetprop wt | wb | nora | ra | adra-l0-a0

Or

Megacli-ldsetprop-cached |-direct-10-a0

Or

Enable / disable disk cache

Megacli-ldsetprop-endskcache |-disdskcache-10-a0

4. Create / delete arrays

4.1Create a raid5 array consisting of physical disk 2meme 3j4. The hot spare of this array is physical disk 5.

Megacli-cfgldadd-R5 [1wb direct-hsp [1:5]-a0

4.2 create an array without specifying a hot backup

Megacli-cfgldadd-R5 [1wb direct-a0

4.3 remove Array

Megacli-cfglddel-L1-a0

4.4 add disks online

Megacli-ldrecon-start-R5-add-physdrv [1:4]-L1-a0

This means that the rebuild logical disk group 1 Magi raid level is 5, and add the physical disk number: 1:4. After the reconstruction, the newly added physical disk is automatically rebuilt (synchronized). At this time, fdisk-l cannot see the larger space of the array and can only be seen after the system is rebooted. If there is only one partition under the array, then the partition also directly increases, if there are multiple partitions, do not know how to allocate the new space? Try it sometime, hehe

5. View array initialization information

5.1 after the array is created, there will be a process of initializing the synchronization block, and you can see its progress.

Megacli-ldinit-showprog-lall-aall

Or display it in a dynamic visual text interface.

Megacli-ldinit-progdsply-lall-aall

5.2 View the progress of array background initialization

Megacli-ldbi-showprog-lall-aall

Or display it in a dynamic visual text interface.

Megacli-ldbi-progdsply-lall-aall

6. Create a global hot backup

Specify the fifth disk as the global hot backup

Megacli-pdhsp-set [- enclaffinity] [- nonrevertible]-physdrv [1:5]-a0

It can also be designated as a dedicated hot backup for an array

Megacli-pdhsp-set [- dedicated [- array1]] [- enclaffinity] [- nonrevertible]-physdrv [1:5]-a0

7. Delete the global hot backup

Megacli-pdhsp-rmv-physdrv [1:5]-a0

8. Offline / online a physical disk

Megacli-pdoffline-physdrv [1:4]-a0

Megacli-pdonline-physdrv [1:4]-a0

9. Check the progress of physical disk reconstruction

Megacli-pdrbld-showprog-physdrv [1:5]-a0

Or display it in a dynamic visual text interface.

Megacli-pdrbld-progdsply-physdrv [1:5]-a0

Download address: http://gcolpart.evolix.net/debian/misc/dell/megacli-1.01.24-0.i386.rpm

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All series of dell machines, as long as they are perc raid controllers, can be detected by megarc as a command line tool.

Megarc for windows

After unzipping, it is megarc.exe

Megarc for linux

After unzipped with unzip, chmod 700megarc*

The parameters under windows and linux are the same:

Megarc-dispcfg-a0

. / megarc-dispcfg-a0

The output is as follows:

Logical drive: 0 (adapter: 0): status: optimal

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Spandepth: 01 raidlevel: 5 rdahead: adaptive cache

Stripsz: 064kb stripes: 4 wrpolicy: writeback

Logical drive 0: spanlevel_0 disks

Chnl target startblock blocks physical target st

00000 × 00000000 0x0887c000 online

0 01 0 × 0 00000000 0x0887c000 online

0 02 0 × 0 00000000 0x0887c000 online

0 03 0 × 0 00000000 0x0887c000 online

If you want to view it through a graphical interface, you have to install the big guy: dell openmanage server administrator

There are more than 90 m under linux and more than 100m under win.

Dell has a better tool under linux: raidmon (for win's hasn't been found yet)

Currently supports ide / eide, scsi raid: lsi logic cerc ata 100, perc 4/dc, perc 4/di, perc 4/sc, lsi logic (formerly ami) perc3/dc, perc3/dcl, perc3/qc, perc3/sc

Perc-cerc-apps-6.03-a06.tar.gz

Http://support.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=r71524&formatcnt=2&fileid=92846

After unpacking, there is a megamon-4.0-0a.i386.rpm

After installation / etc/init.d/raidmon start

# tail-f / var/log/megaserv.log can see the test report. When there are problems, it will be reflected in this log.

You can also edit / etc/megamon.conf to add the administrator's mailbox to the end of the file, so that when an error is detected, the message will be sent automatically.

(mail.35.cn seems to be filtered out as spam.)

Therefore, it is suggested that megarc (manual) with raidmon (automatic) is a better solution.

The perc 5gami sas raid controller of dell 1950 uses this command line tool:

Megacli for linux

Http://www.lsi.com/support/downloads/megaraid/miscellaneous/linux_megacli_1.01.24.zip

Megacli for windows

Http://www.lsi.com/support/downloads/megaraid/miscellaneous/windows_megacli_1.01.25.zip

# unzip linux_megacli_1.01.24.zip

# unzip megaclilin.zip

# rpm-ivh megacli-1.01.24-0.i386.rpm

# / opt/megacli-cfgdsply-aall

The output is as follows:

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Adapter: 0

Product name: perc 5/i integrated

Memory: 256mb

Bbu: present

Serial no: 12345

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Raid level: primary-1, secondary-0, raid level qualifier-0

Size:285568mb

State: optimal

Physical disk: 0

Media error count: 0

Other error count: 0

Firmware state: online

Physical disk: 1

Media error count: 0

Other error count: 0

Firmware state: online

At this point, the study on "how to view Raid disk array information under linux" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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