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Questions tagged [trim]

49 questions
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Is TRIM passed through a LVM-based PV Xen domU to the underlying SSD

Scenario: -- Debian Xen dom0 -- SSD drive setup as LVM PV/single Volume Group. -- Debian pv_ops-based domU setup on LVM logical volume. -- File system inside domU is ext4 with discard option enabled. Question: Will the TRIM command generated inside…
Brian Blood
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Do I need to trim my SSD? How?

I have been using a pair of Intel 320 in RAID 1 on my busy Ubuntu server for about 4 month. While the disk usage never reached 50% of the capacity, but I FEEL that the server has become less responsive, so I'm wondering whether I need to run a trim,…
alfish
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Linux tool to reset Intel X25 SSDs wear leveling tables?

I'm aware of the DOS utility to "Reset" an Intel SSD to factory settings, but I'd rather not shut down my system to do this to my SSDs. Supposedly newer kernels support TRIM, but I haven't found any utilities to actually run TRIM. Has anyone found a…
Joel K
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When and how often does ZFS 'autotrim' take place?

I have read "Add TRIM support" article, but failed to get a clue for "When and how often does ZFS autotrim take place?" And How can I observe activities of autotrim? Thanks for your comments in advance.
sohnman
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Using SSD drives in a raid in an operation involving little to no deletes

From what I've been able to understand when reading about the case with Solid State drives and raids, the problem is that TRIM cannot be used for them in a raid configuration, thus, resulting in the disks becoming slower over time when files are…
Aron Lander
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Is TRIM possible on SSD disks in RAID 1?

I am going to build a new server to handle a high-traffic php/mysql site. I am going to use SSD disks to benefit from fast random read performance but really got confused about choosing the right SSD type and (possible) RAID arrangement. I need a…
alfish
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SSD on Vmware ESXI 4 (TRIM? Good Idea?)

I just posted about finding bottle necks and have narrowed it down to having way too many VMs on my machine on one 15K SAS drive. I have plenty of cores and plenty of ram. So I am planning on putting 6 VMs on one drive (so 5 drives for 30 VMs). I am…
nextgenneo
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fstrim is very slow on xfs and always return same value unlike ext4

I just noticed if I do time fstrim /; time fstrim / the 2nd call usually print 0 bytes trimmed and finished immediately. However if I do same thing on XFS, 2 of the calls are taking exactly same time and print exactly same…
Wang
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Is there a "TRIM" command for dmcrypt devices?

When using an encrypted drive in a virtual machine, the VM image starts very small if you do not initialize the drive with random data. When you fill the drive, it grows, but when you delete files it doesn't shrink. With a not encrypted drive, you…
allo
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SSD fstrim on CentOS 6.x with software raid5

I have some CentOS 6.x servers. They have software raid1 and fstrim works well there. On one of the servers, I decided to do software raid5 and ext4. I can mount it with discard and there is no error message. However if I decide to run fstrim, I get…
Nick
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TRIM Support in PERC H310 Mini

I am running Debian 8 on a Dell PowerEdge R420. The OS is installed onto a INTEL SSDSC2BA800G3T SSD running the 5DV1DL03 firmware. The SSD is connected through a PERC - H310 RAID controller (fw 2.121.14-3811). There is no RAID configured, the SSD…
rasebo
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Is it really necessary to use fstrim on Samsung SM843T SSDs?

Should we schedule periodical fstrims on Samsung SSD drives? What happens if we don't run such periodical scripts? I am highlighting the model on the Title because I am assuming that the answer is model/manufacturer specific. What we are using: 2…
King Claudius
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LSI 9207-8i and Samsung 850 PRO TRIM support

A Dell R610 server with LSI 9207-8i HBA card has 6 Samsung 850 PRO SSDs connected to it. hdparm shows TRIM support: sudo hdparm -I /dev/sdc | grep -i trim * Data Set Management TRIM supported (limit 8 blocks) However executing the…
A.Jesin
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TRIM on OCZ RevoDrive 3 on CentOS

I've got an OCZ RevoDrive 3 mounted as / on my CentOS 6.3 box running kernel 2.6.32-220.17.1.el6.x86_64. /boot is on a HDD since OCZ's driver apparently doesn't yet support booting directly to it. While testing, the drive mounted with the 'discard'…
Seventoes
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SSD TRIM Support in Snow Leopard

Does Mac OS X Snow Leopard officially support SSD TRIM yet? If not, is there an expected availability? Also, is there a brand of SSD that is most compatible with a late-2009 Mac Pro?
Mark Richman
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