If you are referring to the in-use space shown in the GUI, AND you have NOT over provisioned that storage pool, then no. The array will never shutdown if you have over provisioned your storage pool. However, new writes will return errors to the serves. Some filesystems like Linux EXT4 will automatically remount the volume READ ONLY when that happens.
The SAN is a block device, it is not aware of files or filesystems When a file is deleted, unless the host sends the UNMAP command, AND an enitre 15MB page is then freed, the space will not returned to the freespace in the pool. Also, if the volumes are replicated or thick provisioned UNMAP has no affect on the in-use space show in the EQL GUI. You should always monitor in-use space from the server's point of view. The array will re-use previously allocated blocks as the server writes updates.
I saw your other post after I replied to this one.
The answer is no. If the storage pool was full that will not cause an array to go offline. If you over provision a pool and havde thin provisioned volumes, those volumes might go offline or read only The member itself will not go offline as you showed in that other post. A HW failure has occurred which is either binging the PSM-4110 down or a networking problem is preventing it from accessing the network.
dwilliam62
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July 20th, 2023 07:00
Hello,
If you are referring to the in-use space shown in the GUI, AND you have NOT over provisioned that storage pool, then no. The array will never shutdown if you have over provisioned your storage pool. However, new writes will return errors to the serves. Some filesystems like Linux EXT4 will automatically remount the volume READ ONLY when that happens.
The SAN is a block device, it is not aware of files or filesystems When a file is deleted, unless the host sends the UNMAP command, AND an enitre 15MB page is then freed, the space will not returned to the freespace in the pool. Also, if the volumes are replicated or thick provisioned UNMAP has no affect on the in-use space show in the EQL GUI. You should always monitor in-use space from the server's point of view. The array will re-use previously allocated blocks as the server writes updates.
Regards,
Don
dwilliam62
4 Operator
•
1.5K Posts
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July 20th, 2023 08:00
Hello,
I saw your other post after I replied to this one.
The answer is no. If the storage pool was full that will not cause an array to go offline. If you over provision a pool and havde thin provisioned volumes, those volumes might go offline or read only The member itself will not go offline as you showed in that other post. A HW failure has occurred which is either binging the PSM-4110 down or a networking problem is preventing it from accessing the network.
Regards,
Don
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