lvm - Is there any way to setup a raid device after installation? - Ask Ubuntu


i set storage-manager server connect via iscsi main system , trying set mirrored volume. resultant volume mirror of /dev/sda1 , /dev/sdd4, noticed there no raid devices set up. (here output of cat /proc/mdstat)

    personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]     unused devices: <none>

due set lvm combines 2 disks not wanted... raid1... how... mdadm?

tried it: output of following command says "mdadm: no raid-devices specified" 

    sudo mdadm --create --verbose /dev/md0 --level=raid1 /dev/sdd4 /dev/sda1

i'm assuming because device /dev/md0 doesn't exist.

so question how/could make /dev/md0 raid device work raid1 setup , mdadm (without reinstalling system)? if proves impossible, how set mirrored lvm on ubuntu 16.04?

any insight appreciated. thanks!

thanks terrance found tutorial works great

https://www.howtoforge.com/how-to-set-up-software-raid1-on-a-running-system-incl-grub2-configuration-ubuntu-10.04

basically instructions follows:

    1.) change partition type --> fdisk /dev/sdd --> press t, select partition, l list codes, looking "linux raid setup" fd     2.) above every volume plan add --> fdisk /dev/sda | t | 1 | fd     3.) 0 superblock of devices --> mdadm --zero-superblock /dev/sdd4     4.) create raid device --> mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/sdd4 /dev/sda1     5.) check make sure device exists --> cat /proc/mdstat --> should see raid device     6.) create filesystems on our raid array --> mkfs.ntfs /dev/md0      7.) mount raid array --> mount /dev/md0 /srv      8.) recommend benchmark array have idea if going wrong

Comments

Post a Comment

Popular posts from this blog

download - Firefox cannot save files (most of the time), how to solve? - Super User

this not full duplicate of this question or this question , though base question same. however, questions have no answers. for on half year have problems downloading files firefox. when click on download link, download dialog opened asking me do, save or open it. immediately, there error/warning pop-up (twice, can see 1 @ first) ok button. looks this message : "c:\users\%user%\appdata\local\temp\wbbdv9k8.zip.part not saved because source file not read. try again later or contact server administrator." replace '%user%' name of user trying download. after closing pop-up, download dialog disappears , have minimize firefox , open again, see other pop-up. downloading exact same file internet explorer work, not desired. i tried solutions here . tried solutions here . tried disabling extensions. tried fixing permissions on temp folder. tried making files , folder in profile directory non-readonly. tried running firefox administrator. tried
Read more

windows - "-2146893807 NTE_NOT_FOUND" when repair certificate store - Super User

i try repair certificate store in windows 10 doing c:\windows\system32>certutil -store -user ‎330000019dba8d5dddb98062a900000000019d "personal" certutil: -store command failed: 0x80090011 (-2146893807 nte_not_found) certutil: object not found. i have double check mmc, certificate details serial number of certificate. still fail repair certificate store. can please help? i getting same error when trying export pfx. turns out had export c:\cert.pfx instead of cert.pfx (it trying export file cert store ( cert:\localmachine\my ).
Read more

sql server - "Configuration file does not exist", Event ID 274 - Super User

sql server 2014 standard in server 2012 r2 i installed sql server 2014 in drive d: i following error: microsoft ssis service: registry setting specifying configuration file not exist. attempting load default config file. simply add c:\program files\microsoft sql server\1?0\dts\binn\msdtssrvr.ini.xml to default reg_sz value in: hkey_local_machine\software\microsoft\microsoft sql server\1?0\ssis\serviceconfigfile where ? replaced matching sql server version
Read more