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Apr
22
comment Very irregular disk write performance and repeated SATA timeouts
OTOH, Seagate actually works on host aware SMR disks and has already started optimizing Linux file systems, I/O layers and so forth to exploit the performance potentials of such disks. See here: github.com/Seagate/SMR_FS-EXT4 and here: article.gmane.org/gmane.linux.ide/59715 Which sounds VERY promising.
Apr
22
comment Very irregular disk write performance and repeated SATA timeouts
That's true. Here's what Seagate Support has to say about SMART errors and SATA timeouts: "Thank you for contacting Seagate Support. I do apologize for the inconvenience. Unfortunately, It appears that you are not using the hard drive for what it was designed for. This would explain the data loss, and the issues you are experiencing. ..." Of course! Disk errors are always the user's fault. Aren't they? </sarcasm>
Apr
19
revised Very irregular disk write performance and repeated SATA timeouts
add summary of answers to first question
Apr
19
comment Very irregular disk write performance and repeated SATA timeouts
Unfortunately I have no other environment to test in right now (just two identical PCs). But I already had three of those drives: the first had a thousand bad sectors (according to SMART) after a couple days, the second wouldn't even spin up and the third now has those timeouts and "End-to-End" errors. I'm starting to feel a little stupid, other poeple are totally happy with the drives according to some reviews in online shops ...
Apr
19
comment Very irregular disk write performance and repeated SATA timeouts
I tried when I got the first disk which failed (see bugzilla.kernel.org/show_bug.cgi?id=93581). Seagate phone support pointed me to where I bought the drive. They also said getting it replaced there would be better for me because if I talked to Seagate directly I would get a refurbished drive as a replacement and it would take longer ...
Apr
19
awarded  Supporter
Apr
19
comment Very irregular disk write performance and repeated SATA timeouts
Thank you! I tried many kernels between 3.17 and 4.0.0rc7 and all exhibit the timeouts and subsequent crashes of the SATA subsystem with this drive in my system. I cannot go below 3.17 because of bugzilla.kernel.org/show_bug.cgi?id=59321. Also I actually suspect I have another failing drive right now (some SMART "End-to-End" errors appeared yesterday evening), so I'm slowly losing my faith in Seagate, again ... Can you try increasing the SATA timeout in 3.19 and see if the array stays alive? It's in /sys/block/sdX/device/timeout where sdX is your disk. Thanks!
Apr
18
comment Very irregular disk write performance and repeated SATA timeouts
Update: I also tried copying from a fast medium (SSD) and the symptoms are still the same. However I can find no other reports online with similar symptoms. I already upgraded to kernel 4.0.0-rc7, no change. I also had to return the harddisk three times because the first units were completely unusable (wouldn't even turn on or had lots of bad sectors), so chances are that I have again a bad disk (or found a bug in the firmware), but how do I tell? smartmontools tell me the disk is fine.
Apr
13
comment Very irregular disk write performance and repeated SATA timeouts
So is it possible that my disk acted like it did because I copied data from an old 1TB external USB2 disk that could only do 30MB/s? I could see the disk writing for ~1s at ~180MB/s every 5..10s, so I had assumed it would have enough time in between to do its "shing" (no pun intended).
Apr
13
revised Very irregular disk write performance and repeated SATA timeouts
downvote was removed -> removed previous edit
Apr
12
revised Very irregular disk write performance and repeated SATA timeouts
Kernel messages and debug info removed since the question was downvoted. I assume this is because it was too long.
Apr
12
comment Very irregular disk write performance and repeated SATA timeouts
Thanks. In this review the disk starts write performance at >100MB/s, then goes down to a few MB/s and eventually settles at about 30MB/s. This I would accept. But my disk starts out with highly fluctuating write performance, then long pauses with no writes at all (but a filled NCQ) and eventually write timeouts and SATA bus resets. These occur even when reading from a source that isn't much faster than 30MB/s anyway (like an old USB2 HDD or a network share). So why does my disk pause completely, and not just slow down?
Apr
11
asked Very irregular disk write performance and repeated SATA timeouts
Jul
10
comment Postfix policyd dual usage setup - greylisting and quotas
Do you have a working example configuration? I have tried cluebringer but despite quite decent documentation and even a web UI, I don't think I have figured it out completely.
Nov
21
awarded  Student
Nov
4
awarded  Tumbleweed
Oct
28
asked Postfix policyd dual usage setup - greylisting and quotas
Apr
5
awarded  Editor
Apr
5
revised Apache Passenger with Rails 3 Environment?
added URL to bug report
Apr
2
answered Apache Passenger with Rails 3 Environment?