enabling TRIM on an existing UFS file system ?

[Mike Tancsa]

I noticed TRIM was not enabled on an existing SSD drive, so I thought I 
would shut the box to single usermode and enable it.

# tunefs -t enable /dev/ada0p2
# tunefs -p /dev/ada0p2
tunefs: POSIX.1e ACLs: (-a)                                disabled
tunefs: NFSv4 ACLs: (-N)                                   disabled
tunefs: MAC multilabel: (-l)                               disabled
tunefs: soft updates: (-n)                                 enabled
tunefs: soft update journaling: (-j)                       enabled
tunefs: gjournal: (-J)                                     disabled
tunefs: trim: (-t)                                         enabled
tunefs: maximum blocks per file in a cylinder group: (-e)  4096
tunefs: average file size: (-f)                            16384
tunefs: average number of files in a directory: (-s)       64
tunefs: minimum percentage of free space: (-m)             8%
tunefs: space to hold for metadata blocks: (-k)            6408
tunefs: optimization preference: (-o)                      time
tunefs: volume label: (-L)
# exit

But once I boot up, it seems to be disabled again ?

0(mdt)# tunefs -p /dev/ada0p2
tunefs: POSIX.1e ACLs: (-a)                                disabled
tunefs: NFSv4 ACLs: (-N)                                   disabled
tunefs: MAC multilabel: (-l)                               disabled
tunefs: soft updates: (-n)                                 enabled
tunefs: soft update journaling: (-j)                       enabled
tunefs: gjournal: (-J)                                     disabled
tunefs: trim: (-t)                                         disabled
tunefs: maximum blocks per file in a cylinder group: (-e)  4096
tunefs: average file size: (-f)                            16384
tunefs: average number of files in a directory: (-s)       64
tunefs: minimum percentage of free space: (-m)             8%
tunefs: space to hold for metadata blocks: (-k)            6408
tunefs: optimization preference: (-o)                      time
tunefs: volume label: (-L)
0(mdt)#

the SSD seems to report that it does support TRIM

  camcontrol identify /dev/ada0
pass0: <SATA SSD S9FM01.9> ACS-3 ATA SATA 3.x device
pass0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)

protocol              ATA/ATAPI-10 SATA 3.x
device model          SATA SSD
firmware revision     S9FM01.9
serial number         D702074B106B01006208
cylinders             16383
heads                 16
sectors/track         63
sector size           logical 512, physical 512, offset 0
LBA supported         31277232 sectors
LBA48 supported       31277232 sectors
PIO supported         PIO4
DMA supported         WDMA2 UDMA6
media RPM             non-rotating

Feature                      Support  Enabled   Value           Vendor
read ahead                     yes      yes
write cache                    yes      yes
flush cache                    yes      yes
overlap                        no
Tagged Command Queuing (TCQ)   no       no
Native Command Queuing (NCQ)   yes              32 tags
NCQ Queue Management           no
NCQ Streaming                  no
Receive & Send FPDMA Queued    no
SMART                          yes      yes
microcode download             yes      yes
security                       yes      no
power management               yes      yes
advanced power management      yes      no      0/0x00
automatic acoustic management  no       no
media status notification      no       no
power-up in Standby            no       no
write-read-verify              no       no
unload                         yes      yes
general purpose logging        yes      yes
free-fall                      no       no
Data Set Management (DSM/TRIM) yes
DSM - max 512byte blocks       yes              8
DSM - deterministic read       no
Host Protected Area (HPA)      yes      no      31277232/31277232
HPA - Security                 no

This is an mSata drive in an Alix APU. Is it possible it really does not 
support it ?

=== START OF INFORMATION SECTION ===
Device Model:     SATA SSD
Serial Number:    D702074B106B01006208
Firmware Version: S9FM01.9
User Capacity:    16,013,942,784 bytes [16.0 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-3 (minor revision not indicated)
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri May  8 10:48:14 2015 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

	---Mike

-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/