Reallocation event count что это




Куплен SSD Crucial M500. Буквально сегодня только привезли.
Сразу погнал по тестам, просмотрел S.M.A.R.T. и что интересно вижу предупреждение Reallocation Event Count в HD Tune.
Проверил в другой программе SSDlife Pro, здесь по мнению программы якобы все гуд. Взял третью программу SpeedFan там тоже особых проблем нет. Но тем не менее значения в последних двух больше нуля.
И вот не знаю стоит ли по этому поводу волноваться. По крайней мере можно с неделю помониторить на наличие изменений, если хоть какие то сдвиги в худшую сторону сдать назад по гарантии.

Игры зло и зря потреченое время.

Тема не о том. А о том стоит ли беспокоиться. За последние 10 лет повидал брак среди всевозможных комплектующих, всезможных брендов. Брак есть всегда, от этого не застрахуешься. Где больше, где меньше, но он есть.
У меня был HDD, в котором было 2 бед блока, они то ли там уже присутствовали или появились в первые пару месяцев эксплуатации, не знаю. Но с тех пор HDD прослужил мне 7 лет и сейчас уже год работает у другого хозяина. Все те же 2 беда S.M.A.R.T идеален.

Игры зло и зря потреченое время.

Сказал(а) спасибо: 119

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Адрес: South Ural

забей на это и не думай. все эти тест проги глючат

Пользователь сказал cпасибо:

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А если нэ глючит)))
Будет большой эпик фейл)))))

Король - не вечен, но остаётся королём.

Сказал(а) спасибо: 8

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Страшно жить. вдруг завтра кирпич на голову упадет или зазевавшийся водитель размажет по лобовому стеклу))
Короче, пока погоняю недельку, как писал выше. Если изменений особых не будет оставлю.

А если нэ глючит)))
Будет большой эпик фейл)))))

Если уж вещица и выйдет из строя так тому и быть(в принципе опять же по гарантии сдам). И никак ни эпик фейл, а неприятность и некоторое огорчение, которая на фоне действительно важных вещей и вовсе сущий пустяк!

Игры зло и зря потреченое время.

Recently I bought a second hand HD which I immediately tested by running the drive reinitialization with default values. The test was successful, no bad sectors or any warnings.

Some days after installing the drive, I saw that the health of the drive went down. This was due to the current pending sector count. I checked the cables etc. and reran reinitialization and the count went to zero. However, at this point, the reallocation event count also rose when the drive was processing the weak sector areas but the actual reallocated sectors count didn't. I tried a regular Windows format operation but it also only made the reallocation event count rise but no sectors were reallocated.

Currently the count shows 99 but still there are no reallocated sectors according to the data. How is this possible, does it mean that there are actually no spare areas at all? Is it actually more likely that there is some other problem than the drive failing since the pending sectors count is not constant?

Thanks for any thoughts.

On a new hard disk, there should be free spare area for reallocation, so it should not be problem. If the drive would report high number of bad (reallocated) sectors, then it is possible that the spare area is full - but on a new drive it is not possible.

The reallocation event count increases in all attempts when the drive starts the reallocation procedure. This includes all attempts when the reallocation does not complete because of a device error or when the drive finds that the reallocation is not required as the sector currently seems usable. I mean that during the reallocation the drive tries to copy all data from the problematic sector to the spare area (usually by special methods and by slower speed) and it is possible that during this, the sector seems perfect - and the drive cancels the reallocation.

However yes, the corresponding sector may be damaged from time to time and if this happens, it may result in
- lower performance when accessing the sector (as the drive may periodically try the reallocation)
- damaged file(s) / file system if the sector goes to the pending (weak) state

Yes, the Reinitialise Disk Surface test in most cases forces the drive to reallocate the corresponding sector - but some drives may not perform the reallocation this way.

Some time ago I experienced similar on a 500 GB Hitachi drive. The Disk menu - Surface test - Read test showed that the 3rd block was much slower than expected (the surface map always showed a darker green block there, regardless of how many times the test started). Accessing (for both reading / writing) increased the reallocation even count value - but no sectors were actually reallocated, even when the Reinitialise Disk Surface Test started (and targeted only that particular block) 100 times.

The best solution was to create a small partition (500 MB) on the beginning of the drive (which contained the problematic area), then create a big partition for the actual, good data area and then removing the first small partition. This way during normal use the drive never accessed those problematic sectors and (by losing 0.1 % capacity) I could make the drive working without problems, without further issues and degradations in the health, there are no file/file system damages and so. The drive is still working after years of this.

Not sure, but if your drive reports the problem (maybe slowness by Disk menu - Surface test - Read test) on the same block (even after you re-run the test), and it is in the beginning / end of the drive surface area, such solution can help.

Ps. it may be interesting to check the actual situation (complete S.M.A.R.T. information) of this drive in this special case, so please use Report menu - Send test report to developer option.
You may use it many times, for example now and later if you perform some testing / using of the drive, so then it is possible to check any changes.

Announcement

Reallocation event count

Hi, I didn't know where else to ask this but here it goes.

I bought a new Western Digital 250gb Sata 3.0 drive(WDC WD2500AAKS) and have no issues.

One thing I noticed when I ran Disk Checkup and checked the S.M.A.R.T. attributes is the reallocation event count has a raw value of 1 and a value of 199, Get Smart shows the raw value as 1 and a value of 199 also. So I ran the Western Digital diagnostic from a boot disk and let it run a full test and it came up with no errors. I then downloaded and ran HDD Health and Speed Fan 4.35 and checked the S.M.A.R.T. attributes and they both showed reallocation event count raw value as 0 and a value of 200. Which one do I believe? And is this something I should RMA the drive for? I think yes if it really is 1, but I don't know if disk checkup or Get Smart are reading it incorrectly. So WD diag gives the drive a pass, two programs show the reallocation event count as 1 and two others show it as 0.

By the way my motherboard is Asrock 4CoreDual Sata(VT8237S southbridge) and i'm running XP Pro.

I also ran SmartUDM from a boot disk, it shows the value as 199.

Edit: I tried ActiveSmart and it showed the reallocation event count raw value as 0.

Last edited by street_lethal ; 08-23-2008, 03:26 AM.

All newer hard drives have spare sectors on them (the spare sectors pool , or spare area ).

So when a sector goes bad, which is not that unusual, the hard drive swaps the bad one for a good one (remapping).

In the case of a physical problem this is permanent. But (my understanding) is that in the case of a software corruption type of problem, these 'bad' sectors might be put back into use at a later date. This is more hearsay than actual factual information however.

I wouldn't worry about 1 relocation. But if the number starts to significantly increase I would think about returning the drive.

08-23-2008, 01:07 PM

Thanks for the response.

Actually I was reading the other SMART logs incorrectly with the other programs, they show the RAW number in a long string of numbers, i.e. 0000000000001. The thing is this drive is still under warranty through Newegg so I could RMA it no questions asked. Just annoys me that a new drive has this going on already. I have a 4 year old WD drive that has none of these issues and a another WD drive that is over a year old that has none of these issues. This 250gig is a little over two weeks old. I'm just wondering if I RMA this one if the new one will have the same issue and I will run in circles.

The one thing i'm not clear on after reading this: * Reallocation Event Count The raw value contains the total number of the remapping attempts (including not only successful but also abortive attempts).

Since my Reallocated Sector Count raw value is 0 does this mean that SMART is showing me 1 aborted attempt? If it is what are some of the reasons it cold have been aborted? I know questions questions. Thanks again.

Last edited by street_lethal ; 08-23-2008, 04:50 PM.

Yeah, i'm not even going to bother asking them. I asked the question here about the Disk Checkup S.M.A.R.T. reading because I figured you designed the program and knew S.M.A.R.T. inside out.

I'll keep the drive and if it starts to act funky I will RMA it. it has a three year warranty. I RMA'd a drive back to WD several years ago and they were actually pretty fast with the whole thing. I have too much stuff to do during the week to bother with a RMA with Newegg right now. I do weekly Ghost backups anyway. I'll keep an eye on it. Thanks.

Источники: http://www.hardforum.ru/t112332/, http://www.hdsentinel.com/forum/viewtopic.php?p=12987, http://www.passmark.com/forum/archive/index.php/t-1722.html



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