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I'm running VMware Workstation 12, and am trying to have it see SCSI0:0 as an SSD drive.
I want to have the discard mount option and fstrim / work on ext4 and btrfs.
I added the following to my .vmx file:
scsi0:0.virtualSSD = 1
But in Linux (both Mint 17.2 and Manjaro 16.08, /sys/block/sda/queue/rotational contains 1, meaning it's not a spindle and platter disk.
However, smartctl -a /dev/sda disagrees:
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.16.0-38-generic] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Vendor: VMware, Product: VMware Virtual S Revision: 1.0 User Capacity: 274,877,906,944 bytes [274 GB] Logical block size: 512 bytes Rotation Rate: Solid State Device Device type: disk Local Time is: Tue Oct 25 08:35:07 2016 ICT SMART support is: Unavailable - device lacks SMART capability. === START OF READ SMART DATA SECTION === Error Counter logging not supported Device does not support Self Test logging
How do I get rotational to be 0 (and thence get TRIM working?)
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Tom Hale
Posted 2016-10-26T11:45:40.800
Reputation: 1 348
Are you sure VMware advertises the TRIM command for its virtual drives? What are actually trying to accomplish, auto-shrinking images? – Daniel B – 2016-11-10T21:55:02.757
Relevant source code: http://lxr.free-electrons.com/source/drivers/scsi/sd.c?v=4.7#L2731 - you could hack in a few printk to debug, see same file for example.
– Daniel B – 2016-11-10T22:18:17.820@Daniel B This seems to indicate that it should support
– Tom Hale – 2016-11-13T03:02:20.363TRIM. Yes, I'm trying to auto-shrink images - they are constantly growing in sizeI don’t see anything indicating TRIM support there. Indeed, the only thing I found was about vSphere 6.0, but it wasn’t about auto-shrinking images. I’m quite sure VMware Workstation doesn’t support this. – Daniel B – 2016-11-13T09:41:18.430