This post is for the users of the great dm-multipath system in Linux, who encounter a major availability problem when attempting a resize of mpath devices (and their partitions), and find themselves scheduling a reboot. This documented is based on a document created by IBM called “Hot Resize Multipath Storage Volume on Linux with SVC”,…
Well, this is rather common. Network-free seeding is being performed through using a tape device. What happens if you do not have a tape device? We have the poor-man’s huge TB disks (SATA for the people) connected to simple PC systems, but no tape… We perform network-free seeding into disk. There is a utility called…
I have had some work done lately with NetApp SnapMirror. I have snapped-mirrored some volumes and qtrees and I wanted to monitor their use and behavior over the line. As you can expect, site-to-site replication of data is a fragile thing, especially when done on the level of the storage device, which is agnostic to…
It has been a long while, I know. I was busy with life, work and everything around it. Not much worth mentioning. This, however, is something else. I have discovered an issue with Citrix XenServer 5.0 (probably the case with 5.5, but I have other issues with that release) using NetApp through NetApp API SR…
XenServer is a wonderful tool. One of the better parts of it is its powerful scripting language, powered by the ‘xe’ command. In order to capture a mass of snapshots, you can either do it manually from the GUI, or scripted. The script supplied below will include shell functions to capture Quiesce snapshots, and it…
dm-multipath is a great tool. Its abilities were proven to me on many occasions, and I’m sure I’m not the only one. NetApp, for example, use it. HP use it as well (a slightly modified version, and still), and it works. A problem I have encountered is as follow – if a single path fails,…
