On Sat, 3 Mar 2018 08:55:58 +0100, Ralf Mardorf wrote:

On Sat, 03 Mar 2018 10:20:51 +0300, Andrey Ponomarenko wrote:

...

The primary aim of the project is to find drives with longest "power on hours" and minimal number of errors.

Pardon, but this is idiotic, since the HDDs and SSDs with the longest power on hours and minimal number of errors are already discontinued, if you want to buy a new drive. Your statistic at best is useful to find out what HDDs and SSDs fail much to early, but than consider to care about the usage. Some people turn their computers on and off several times a day, this isn't good for a HDD, while others have got uptimes of more than a year. Other people are maintaining SSDs with kid gloves, OTOH other are using SSDs in the same way, as they use/d HDDs. btw. I'm using my SSDs without kid gloves and when I wanted to order additional SSDs of the same kind, I couldn't get them anymore, let alone the best HDDs I every used.

Not to mention what crap as e.g. GVFS does to green external HDDs :D. [rocketmouse@archlinux ~]$ pacman -Qi gvfs | grep Description Description : Dummy package A dummy packe is required to solve insane, useless dependencies. My external WD green drive stays asleep, it does not spin down and up again and again. It did, before I replaced GVFS by a dummy package. GVFS is just one HDD killer of several HDD killers. -- $ pacman -Q linux{,-rt-securityink,-rt,-rt-pussytoes,-rt-cornflower} linux 4.15.6-1 linux-rt-securityink 4.14.20_rt17-1 linux-rt 4.14.12_rt10-1 linux-rt-pussytoes 4.14.8_rt9-2 linux-rt-cornflower 4.11.12_rt16-1

On Sat, 03 Mar 2018 11:16:30 +0000, Guus Snijders via arch-general wrote:

Op za 3 mrt. 2018 08:56 schreef Ralf Mardorf :

...

On Sat, 03 Mar 2018 10:20:51 +0300, Andrey Ponomarenko wrote:

...

The primary aim of the project is to find drives with longest "power on hours" and minimal number of errors.

Pardon, but this is idiotic, since the HDDs and SSDs with the longest power on hours and minimal number of errors are already discontinued, if you want to buy a new drive. Your statistic at best is useful to find out what HDDs and SSDs fail much to early, but than consider to care about the usage.

Actually, it could be very useful to have a real insight in these figures.

Similar reports by backblaze (a storage company) have been very helpful in deciding which HDD's to buy (or skip!) at $work. Also, this potentially gives *real* insight in SSD reliability; most other sources are "promises" by the manufacturer, some testers and perhaps random people who happened to run into a problem.

Even if most models will indeed have been discontinued by now.

Actually the strategy of companies such as Google obviously is to use consumer drives instead of enterprise drives, different models, from different vendors and much likely different batches, too, since statistics aren't helpful at all. Statistics even say anything useful about drive vendors, as far as I know, no vendor is better than another, just specific _discontinued_ product lines of different vendors were(/still are :) better than other.

Op za 3 mrt. 2018 17:30 schreef Ralf Mardorf :

Also very helpful could be https://en.wikipedia.org/wiki/Ouija the result is useless, too, but a good step into the right direction to notice self-delusion.

When it comes to predicting stats; agreed. This is the other way around; historic data on how $device *has* behaved. Something which can help with replacing early etc. In our case: a certain model HDD was reported with a high error rate. Sure enough, once one of them failed, 2 others were quick to follow. Thanks to the warning from this data, we were prepared and could simply swap the disks without any downtime. Oh yeah, the replacements were from the same brand, just another model. Superstition? Perhaps, but so far, so good ;). Mvg, Guus Snijders