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RedHat Reclaim Storage Space SCV2020
I have a RedHat 6.10 with a raw device mapped directory of a SCV2020 storage compellent.
What I delete from RedHat is not released on storage. fstrim -v returns "FITRIM ioctl failed: Operation not supported"
Does SCV2020 storage not support this? And how to free up this space on the Storage side?
DELL-Sam L
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August 3rd, 2020 10:00
Hello raterista,
That command is not supported on a Compellent system. Here are the steps that need to be done.
Steps
Once that is done then wait about 15minutes and then check available disk space to see if it has increased.
raterista
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August 4th, 2020 02:00
Hello DELL-Sam L
In compellent I have 4 volumes and each of these volumes is mapped in RedHat as a disk (sdb, sdc, sdd and sde).
None of these volumes can be excluded.
I didn't understand how to make Storage recognize what was eliminated in RedHat from the sdb, sdc, sdd and sde disks and present this space back to the Storage volumes.
DELL-Sam L
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August 4th, 2020 09:00
Hello raterista,
These are the steps that should release the space on your compellent. Have you enabled UNMAP on each mounted volume you want UNMAP?
raterista
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August 5th, 2020 10:00
DELL-Sam L,
RedHat is virtualized on a VMWare ESXi and when creating the "Mapped Raw LUN" disk I used the Virtual compatibility mode. Changing to Physical ran # fstrim -v / dir1 successfully
Is it possible to activate UNMAP in the "Virtual" disk compatibility mode on ESXi?
DELL-Sam L
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August 5th, 2020 15:00
Hello raterista,
I am not seeing a way to do unmap in virtual disk compatibility mode.
raterista
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August 7th, 2020 09:00
DELL-Sam L,
I believe it is a limitation of the vmware disk itself in "virtual" mode.
But I appreciate your attention, I will use the "physical" mode.