Web server dies

[Spearfoot]

Here are a series of screenshots showing what to do... 'cause sometimes a picture is worth a thousand words!

Create volume 'HostStorage':

Extend 'HostStorage' with second mirrored pair:

Extend 'HostStorage' with third mirrored pair:

View the result with 'Volume Status':

 

[orddie]

okay i think i did it correctly for my screen looks the same as yours.

 

[gpsguy]

Probably not the issue you had before, but your performance might suffer.

If you re-read the link I posted above, you'll see that 77% usage is not recommended.

"If you want really fast VM writes, keep your occupancy rates low. As low as 10-25% if possible. Going past 50% may eventually lead to very poor performance as fragmentation grows with age and rewrites."

Think i will run into the same issue again because of the 77% usage?

 

[orddie]

Probably not the issue you had before, but your performance might suffer.

If you re-read the link I posted above, you'll see that 77% usage is not recommended.

"If you want really fast VM writes, keep your occupancy rates low. As low as 10-25% if possible. Going past 50% may eventually lead to very poor performance as fragmentation grows with age and rewrites."

what is the recommended action / raid setup than?

 

[gpsguy]

Changing your pool from RAIDz2 to striped mirrors was a step in the right direction. As well as replacing the bad drive.

The potential issue, is the 77% usage. To bring that number down below 50% (or further), you could add additional mirrors to your pool and/or use larger drives in your vdevs (mirrors).

As an example, jgreco (who authored the link I referenced), has a server that he's using for iSCSI targets with ESXi (VMware). The box has 24 x 2TB drives. He has 8 vdevs of 3-way mirrors striped together, which gives him ~14TiB of storage. At 50% usage, he doesn't intend to provision more than 7TiB of storage. I think he's got about 3TiB on it right now.

 

[Spearfoot]

@orddie , as @gpsguy points out -- you're definitely on the right track. But your pool is overpopulated for a VMware datastore.

Note that you don't have to change out all 6 disks in your mirrored pool to see immediate gains in available space. For example, changing one mirrored pair from 2 x 1TB to 2 x 4TB would give you 3TB more storage right away. You could swap out additional pairs later, if need be.