TRIM firmware for the 128 GB Samsung SSD?? [ Edited ]

[alins]

From the Samsung SSD FAQ:

http://www.samsungmemory.com/faq

Do all Samsung SSDs offer TRIM support? 

All Samsung branded consumer solid state drives offer TRIM support.

[chris08]

As a customer who paid premium on his thinkpad, I'd appreciate a trim enabled firmware for my lenovo branded samsung ssd.

Thanks

[alins]

bump.

Please Lenovo, are you listening or are we wasting our time here?

[pleon]

Heh honestly, i am little bit sceptic :-) Anyway, secure erase in BIOS is solution, it returns original SSD performance. After almost 1 year of usage, i had Windows experience index for disc 5.9, after secure erase i have 7.1. it is not ideal, because yo uhave to do it manually, but it works.

[chris08]

so a full disk backup (I use dd which does a sectore-wise backup), secure erase in bios, restore via dd will do the trick? I'm running linux and the read performance has come down from 220 MB to 140 MB/sec

[Hypnos]

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chris08 wrote:

so a full disk backup (I use dd which does a sectore-wise backup), secure erase in bios, restore via dd will do the trick? I'm running linux and the read performance has come down from 220 MB to 140 MB/sec

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A lack of TRIM support should not affect read performance, only write performance due to write amplification.

How are you testing your performance in Linux?  Assuming the testing is valid, do you have a full disk?  The older "ext"-series filesystems, at least, suffer from significant fragmentation when over 90% full.

[pleon]

Well i use standard Lenovo Backup tool Rescue & Recovery, so i have whole disk C backup, then secure erase in BIOS and restore whole dosk C from backup. And after that, Windows Experience index for disk is from 5.9 before changed to 7.1 after.

[icarni]

>>> then secure erase in BIOS


Sorry, what'a this? ... How do I do that?

T500 2082-8WG under WinXPP

[chris08]

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Hypnos wrote:

A lack of TRIM support should not affect read performance, only write performance due to write amplification.

How are you testing your performance in Linux?  Assuming the testing is valid, do you have a full disk?  The older "ext"-series filesystems, at least, suffer from significant fragmentation when over 90% full.

---

Sorry, you are of course right. I measured the read performance again (using the disk utility provided with ubuntu) and everything looks stellar again. 

I'm running ext4 and after half a year of heavy daily usage (software development, working with virtual machines) I have the impression that the performance has degraded somewhat.

[pleon]

Secure Erase is option in BIOS, it is there after some BIOS firmware update on my laptop. This option erase whole content of the SSD by some method. Then if you restore system back on such a SSD, performance is back.