topic Re: Intel 540s Trim support in Solid State Drives (NAND)

Intel 540s Trim support

schoi11 — Thu, 03 Aug 2017 07:57:21 GMT

Hi, I want to know how Intel 540s SATA ssd (120GB) support TRIM command.

When TRIM command is sent from OS does SSD implement TRIM as soon as possible? or at idle time?

I saw that in nvme SSD, TRIM is implemented before GC command but I want to know if SATA 3.1 version Intel 540s also same.

Re: Intel 540s Trim support

idata — Thu, 03 Aug 2017 18:01:39 GMT

Hello ithdli,

Thanks for posting in our forum, we understand you have some questions about TRIM and we'll be more than glad to explain to you.When the TRIM command is sent from the operating system it will try to find the "best moment" to perform the task, meaning that it will run it when the SSD is being less used or idle.This does not mean that you cannot use the SSD if it is in the process, you can use and the function will be running in the background, just like the garbage collection. These two (TRIM and Garbage collection) go together somehow.Please let us know if you have any other question.Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Fri, 04 Aug 2017 02:27:26 GMT

Hi Nestor C.

Thank you for response!

Actually I have more question.

1. Is it guaranteed that TRIM precedes GC?

2. Is that all same for SATA SSD and NVMe SSD like P3600?

I really appreciate with your comment! Thanks!

Re: Intel 540s Trim support

idata — Fri, 04 Aug 2017 22:02:59 GMT

Hi ithdli,

Based on the two questions you have, the answer for both is yes. Please let us know if you have any other question.Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Tue, 08 Aug 2017 05:26:02 GMT

Hi Nestor C,

Thank you for response .

I'll ask again if I get new question. Thanks a lot!

Regards,

Soyee Choi

Re: Intel 540s Trim support

idata — Tue, 08 Aug 2017 12:36:34 GMT

Hi ithdli,

Thanks for your reply.Have a nice week.Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Fri, 11 Aug 2017 05:02:19 GMT

I have one more minor question.

Actually its not that related question with Intel SSD but I'm just curious about.

When I turned off ext4 discard option, TRIM doesn't work even if I issue an "ioctl ( , FITRIM , ) command"?

I thought that ext4 discard option is just related with deleted file so that ioctl command may work.

I just want to know if I was wrong.

- Soyee Choi.

Re: Intel 540s Trim support

idata — Fri, 11 Aug 2017 21:38:33 GMT

Hi ithdli,

We will be checking on this and we'll reply back with the response.Regards,Nestor C

Re: Intel 540s Trim support

idata — Tue, 15 Aug 2017 12:44:18 GMT

Hi ithdli,

We have checked about this and we believe this will help you on how discard command works for ext4 filesystems:https://wiki.archlinux.org/index.php/Solid_State_Drives# TRIM https://wiki.archlinux.org/index.php/Solid_State_Drives# TRIM

http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/ http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/

We understand that when the discard is enabled, the system will get notified when space in the filesystem is freed up, then TRIM happens. This option keeps the SSD at high performance. In a sense, it can be linked to "deleted files" as you stated; however, that's one of the main intentions of TRIM.

Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Wed, 16 Aug 2017 06:06:24 GMT

Hi Nestor C,

Thanks! Your answers and attached links helped me a lot!

Regards,

Soyee Choi

Re: Intel 540s Trim support

idata — Wed, 16 Aug 2017 12:21:52 GMT

Hi ithdli,

You are very welcome, in a case of further assistance, do not hesitate to contact us back.Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Mon, 28 Aug 2017 05:04:49 GMT

Hi Nestor C.

I got a new question with TRIM implementation.

I issued TRIM from application level (totally about 26GB) using 'fallocate( , FALLOC_FL_PUNCH_HOLE ,)' at ext4 file system with discard option on.

As a result SSD has frozen for over 40 minutes as soon as I called 'fallocate' function.

If TRIM works in background policy like GC it is hard to understand why this situation happens.

I wonder if you have any idea with this situation.

In short I want to know the reason why SSD froze as soon as I gave TRIM command although it works in background.

Always thank you for your answer.

Regards,

Soyee Choi

Re: Intel 540s Trim support

idata — Mon, 28 Aug 2017 18:05:35 GMT

Hello ithdli,

First of all, we would like to let you know that this does not seem to be an issue with the SSD but more like a Linux* setup situation.Do you have the latest firmware installed already? Here is the https://downloadcenter.intel.com/download/26491/Intel-SSD-Firmware-Update-Tool?product=80097 Intel® Firmware Update Tool, in case you need to update it.We also https://patrick-nagel.net/blog/archives/337 found this link that may help you with the setup.NOTE: Any links provided for third party tools or sites are offered for your convenience and should not be viewed as an endorsement by Intel® of the content, products, or services offered there. We do not offer support for any third party tool mentioned here.Regards,Nestor C

Re: Intel 540s Trim support

schoi11 — Wed, 30 Aug 2017 13:41:11 GMT

Hi Nestor C,

I thought it was a SSD problem but I'm surprised with that it is a Linux setting overhead.

I'm not sure if I had latest firmware update but I'll check it !

Thanks for your answer!

Regards,

Soyee Choi

Re: Intel 540s Trim support

idata — Thu, 31 Aug 2017 18:21:13 GMT

Hello ithdli,

We're always glad to be of assistance. If there is anything else we can help you with, please let us know.Best regards,Carlos A.