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February 9th, 2022 23:00
R620 single SSD on raid 0 and trim
Hey, as I don't have sas card on my poweredge that would support nonraid (I had to make multiple one disk raid 0's)
but if im replasing disks with SSD's, I need to get trim support from proxmox / ESXi or can quest VM do it also? (I assume quest cannot do it)?
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DELL-Charles R
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February 10th, 2022 11:00
Hello Zaleo,
From your link Daniel is correct. The controller does not do pass-through. The drive the OS see is the virtual disk created i.e. RAID0, RAID1 and so on.
Links with more information :
Dell Solid State Drive (SSD) FAQ with Servers (PowerEdge) and Storage
https://dell.to/34ss6zo
The TRIM/UNMAP command needs to be supported by the OS, the drive, and the controller in order to work…. Current shipping Dell enterprise drives have high enough performance and endurance so they do not yet support these commands even if the OS supports them. These features are being investigated for subsequent Dell SSD offerings.
Is TRIM supported on PERC9 controller in RAID mode
https://dell.to/3oHih7z
I hope this helps.
Dell-Martin S
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February 10th, 2022 07:00
Hi Zaleo,
trim support is a 100% software solution so please check the following thread in proxmox forum.
https://dell.to/3oGla8x
Did you have any other questions?
Regards
Zaleo
6 Posts
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February 10th, 2022 09:00
ok, my question was badly wroted, I had to ask is "non raid" hack or new raid card only way to get trim support, as otherwere is wroten:
"When you use a hardware RAID controller the operating system has no control over the blocks. Any blocks the operating system thinks it is controlling are virtual, so any TRIM/UMAP the OS is doing is against virtual blocks."
https://www.dell.com/community/PowerEdge-HDD-SCSI-RAID/RAID-and-TRIM-Config-for-R720xd-and-SSDs/td-p/4703093