From: "Mathias Burén" <mathias.buren@gmail.com>
To: Roberto Spadim <roberto@spadim.com.br>
Cc: Phillip Susi <psusi@cfl.rr.com>,
David Brown <david@westcontrol.com>,
linux-raid@vger.kernel.org
Subject: Re: SSD - TRIM command
Date: Mon, 21 Feb 2011 23:41:00 +0000 [thread overview]
Message-ID: <AANLkTimrc0Sn8Mn9AM01rjgT1=4DsU6QLQoS3FA7Kn=8@mail.gmail.com> (raw)
In-Reply-To: <AANLkTincnob7V3ockg2nqO_ddeZ9UXdigoX5ZwVxocqH@mail.gmail.com>
On 21 February 2011 22:52, Roberto Spadim <roberto@spadim.com.br> wrote:
> i don´t think so, since it´s ATA command, any ATA compatible can use
> it, it could be used for HD with badblocks and dynamic reallocation
> without problems, the harddisk don´t need a dedicated space for
> badblock. for md software we must know if devices support or not TRIM.
>
> the next question, md is ATA compatible? no!?, it´s a linux device,
> not a ATA device. what commands linux devices allow? could md allow
> TRIM?
>
> 2011/2/21 Mathias Burén <mathias.buren@gmail.com>:
>> On 21 February 2011 20:47, Phillip Susi <psusi@cfl.rr.com> wrote:
>>> On 2/21/2011 2:39 PM, Roberto Spadim wrote:
>>>> sorry, but i sent email without a information:
>>>> TRIM is a 'ATA Specification' command
>>>>
>>>> http://en.wikipedia.org/wiki/TRIM_command
>>>>
>>>> any disk with ATA command could suport TRIM, hard disk or ssd or
>>>> anyother type of phisical allocation
>>>
>>> Sure, but hard disks have no reason to, which is why they don't and
>>> won't support it.
>>>
>>
>> My point exactly.
>>
>> // M
>> --
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>>
>
>
>
> --
> Roberto Spadim
> Spadim Technology / SPAEmpresarial
>
Please don't top post.
http://www.splitbrain.org/blog/2011-02/15-top_posting_like_dont_i_why
Harddrives already have an allocated area with spare sectors, which
they use whenever they need to. You can find out how many sectors have
been reallocated by the HDD by looking at the SMART data, like so:
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE
UPDATED WHEN_FAILED RAW_VALUE
[...]
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail
Always - 0
// M
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next prev parent reply other threads:[~2011-02-21 23:41 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-07 20:07 SSD - TRIM command Roberto Spadim
2011-02-08 17:37 ` maurice
2011-02-08 18:31 ` Roberto Spadim
[not found] ` <AANLkTik5SumqyTN5LZVntna8nunvPe7v38TSFf9eCfcU@mail.gmail.com>
2011-02-08 20:50 ` Roberto Spadim
2011-02-08 21:18 ` maurice
2011-02-08 21:33 ` Roberto Spadim
2011-02-09 7:44 ` Stan Hoeppner
2011-02-09 9:05 ` Eric D. Mudama
2011-02-09 15:45 ` Chris Worley
2011-02-09 13:29 ` David Brown
2011-02-09 14:39 ` Roberto Spadim
2011-02-09 15:00 ` Scott E. Armitage
2011-02-09 15:52 ` Chris Worley
2011-02-09 19:15 ` Doug Dumitru
2011-02-09 19:22 ` Roberto Spadim
2011-02-09 16:19 ` Eric D. Mudama
2011-02-09 16:28 ` Scott E. Armitage
2011-02-09 17:17 ` Eric D. Mudama
2011-02-09 18:18 ` Roberto Spadim
2011-02-09 18:24 ` Piergiorgio Sartor
2011-02-09 18:30 ` Roberto Spadim
2011-02-09 18:38 ` Piergiorgio Sartor
2011-02-09 18:46 ` Roberto Spadim
2011-02-09 18:52 ` Roberto Spadim
2011-02-09 19:13 ` Piergiorgio Sartor
2011-02-09 19:16 ` Roberto Spadim
2011-02-09 19:21 ` Piergiorgio Sartor
2011-02-09 19:27 ` Roberto Spadim
2011-02-21 18:24 ` Phillip Susi
2011-02-21 18:30 ` Roberto Spadim
2011-02-09 15:49 ` David Brown
2011-02-21 18:20 ` Phillip Susi
2011-02-21 18:25 ` Roberto Spadim
2011-02-21 18:34 ` Phillip Susi
2011-02-21 18:48 ` Roberto Spadim
2011-02-21 18:51 ` Mathias Burén
2011-02-21 19:32 ` Roberto Spadim
2011-02-21 19:38 ` Mathias Burén
2011-02-21 19:39 ` Mathias Burén
2011-02-21 19:43 ` Roberto Spadim
2011-02-21 20:45 ` Phillip Susi
2011-02-21 19:39 ` Roberto Spadim
2011-02-21 19:51 ` Doug Dumitru
2011-02-21 19:57 ` Roberto Spadim
2011-02-21 20:47 ` Phillip Susi
2011-02-21 21:02 ` Mathias Burén
2011-02-21 22:52 ` Roberto Spadim
2011-02-21 23:41 ` Mathias Burén [this message]
2011-02-21 23:42 ` Mathias Burén
2011-02-21 23:52 ` Roberto Spadim
2011-02-22 0:25 ` Mathias Burén
2011-02-22 0:30 ` Brendan Conoboy
2011-02-22 0:36 ` Eric D. Mudama
2011-02-22 1:46 ` Roberto Spadim
2011-02-22 1:52 ` Mathias Burén
2011-02-22 1:55 ` Roberto Spadim
2011-02-22 2:01 ` Eric D. Mudama
2011-02-22 2:02 ` Mikael Abrahamsson
2011-02-22 2:22 ` Guy Watkins
2011-02-22 2:27 ` Roberto Spadim
2011-02-22 3:45 ` NeilBrown
2011-02-22 4:37 ` Roberto Spadim
2011-02-22 2:38 ` Phillip Susi
2011-02-22 3:29 ` Roberto Spadim
2011-02-22 3:42 ` Roberto Spadim
2011-02-22 4:04 ` Phillip Susi
2011-02-22 4:30 ` Roberto Spadim
2011-02-22 14:45 ` Phillip Susi
2011-02-22 17:15 ` Roberto Spadim
2011-02-22 0:32 ` Eric D. Mudama
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