Linux Integration Services Version 3.4 for Hyper-V

Linux Integration Services for Hyper-V provides the following functionality: Linux Integration Services v3 4 Read Me Driver support: Linux Integration Services supports the network controller, and the IDE and SCSI storage controllers that were developed specifically for Hyper-V. Fastpath boot support for Hyper-V: Boot devices take advantage of the block Virtualization Service Client (VSC) to […]

mdadm – mismatch_cnt is not 0 on /dev/md0

/etc/cron.weekly/99-raid-check: WARNING: mismatch_cnt is not 0 on /dev/md0 if uncounted the title’s warning in weekly check. We have to do the following to repair and check the array. echo repair >/sys/block/md0/md/sync_action echo check >/sys/block/md0/md/sync_action Ref: http://www.centos.org/modules/newbb/viewtopic.php?topic_id=23164&forum=37 Apparently, a non-zero number is common on RAID-1 and RAID-10 due to various (harmless?) issues like aborted writes in […]

[Linux Raid] mdadm raid 1 resizing partition

In order to resize the raid file system from small capacity to larger one, we should reset the raid size and file system size to new setting. Here are two simple case studies to increase and reduce raid size. Case 1: Increase the size of /dev/md4 from 4GB to 8GB pre-check the file system increase […]