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I wouldn't blame the hard disk first. Run CrystalDiskInfo and the Windows Memory Diagnostic. If CrystalDiskInfo shows UDMA CRC errors, change your SATA cable. Whatever the cause is, you need to backup whatever you can, because file system corruption like that is bad enough that you need to...
It is true because the hypervisor must schedule all cores to run simultaneously every time, but using two cores on hosts that have 4 or more threads of execution available will not be a problem compared to staying at single core.
Windows XP to at least Win 7 have all been subject to extremely long scans that leave the CPU pegged. It would be more annoying with a single core, but I don't think the core count has anything to do with the problem. They have all been down to the complexity of the data to analyze, or...
Followed the MS answers link above, found a number of people who resolved it by turning Large Send Offload V2 to Disabled in their network driver advanced settings on Win7.
Advanced Format is 512e. Advanced Format is not 4Kn.(native)
And it is actually not true that Advanced Format has no special requirements. Software that depends on the 512-byte sector behavior of drives (e.g. database, filesystem) not destroying adjacent sectors in a crash do not...
Actually, you should stick with 512e unless you know otherwise. 4Kn can't be used until you have confirmed that your entire hardware and software stack is ready for it. From the disk controller, BIOS/UEFI, partition tables, external docks, and on up. A lot of components/software can not...
Wow, good idea about the health numbers on other SSDs. Maybe they have been skewed to stay high. Nobody would complain about that.
For OP, in Device Manager, Disk Drives, does your drive have Write caching enabled on the Policies tab for the drive?
The info from Bruce/PNY seems okay to me. He is giving you reasonable conclusions based on the available information.
Try running Resource Monitor on the machines. The Disk tab should show you disk activity, including the program, file, and bytes information. It might reveal your cause.
Start a command prompt(normal) and CD appdata\local\microsoft\windows\explorer
Delete everything in there. You might have to use task manager to kill explorer.exe
Then use task manager to File/Run a new explorer.exe. Reboot.
The description does sound like a Windows 10 problem. But, it is also a problem that is probably only going to show up on a machine that is compiling large programs.
The work isn't going slower with more cores; what is happening is the mouse (and maybe other things) is getting drowned out by...
That could be marginal power on the laptop port. I have seen a drive fail to reliably spin up in marginal power circumstances. One of the reasons the newer USB port types mandate higher power capability.
If the OS isn't running, there shouldn't be any writing going on, even if the drive is...
If we assume that you experience drop outs on this drive, (hence your switch to ReFS), then we can guess that such a thing occurred again. Just because ReFS can confirm the file data is either good or bad, does not mean that ReFS is able to survive corruption of it's own data. Somehow, that...
(This problem seems to have been finally resolved by the Aug 2017 quality & security update.)
This post is FYI for the world. If anybody has anything to add, feel free.
I have two Windows 8.1 computers that over the past few months, I noticed to be
having pauses of about 30 seconds or so, with...
Maybe with Thunderbolt, it recognizes it is an SSD and uses TRIM, the SSD ATA Secure Erase command, or a single-pass of zeroes, and therefore the security options are unnecessary.
Maybe the Greens are intentionally slow in this usage pattern. (write cache off, NCQ in heavy use)
Another possibility is the 4K/non-alignment performance penalty. Most enterprise drives continue to be 512b for some reason.
Maybe the errors you see are also stalling the array?
I was going to post this yesterday, before the thread headed into numbers...
ZFS dedupe currently requires complete block matches, which means it can only get better ;) Greenbytes can probably identify matches at random offsets within a block. This can greatly increase the dedupe rate...
You can't fake a clean scrub. At that moment, your pool is fine.
Possibly, the data is corrupting as it is read out of the SSDs. Could be the SSDs, could be the power, could be your backplane, cables, or controller/ports. Only testing can answer the question.
You have a couple drives that seem good. And a couple drives that seem bad. Shut the system down, swap them in the drive bays, and see whether the problem moves.
Why did the breakers trip? And why two or three times? Possibly your PSU is damaged in a way that is not apparent on the...
If you've never had these problems before, then either the power failure or something you did after that is causing this.
Are the SSDs connected individually, or through cables/enclosures? Have you run a memory test?
Notice those two SSD SMART results show lots of UDMA CRC errors.
I was trying to figure out what could have permanent checksum errors, yet show no data errors: the Free Space Map.
Possibly, ZFS would assume an invalid section of Free Space Map to be full, meaning your pool has some amount of unusable space, but could operate forever. The other...
I suspect that will work, since there seems to be no data errors.
Yes. My guess is the SSDs were rewriting completely unrelated blocks in the middle of the power failure, and this corrupted 'old' data. If it had corrupted 'new' data, ZFS would normally notice that upon restart and rollback...
If you give a zpool clear, rescrub, and the errors reappear, I think you need to recreate the pool from scratch and restore whatever you can. It seems good when it says there are no known data errors. But, your data can be fine, but the pool has problems and you don't want to keep going...
It could be return rate and/or support costs.
Look how many buyers of internal hard drives don't know what they are doing, or give up and return it. Compare that to an external USB drive.
Then, on the flip-side, buyers of the internal drives are willing to pay more. They are also more...
Any clue what drive it is? Can you access the SMART info on any of the drives? If so, whichever one is different from the others needs to be replaced.
Ideally, your card shouldn't hang. But if there is no firmware update for it, then your next option is to fix the underlying problem.
There is probably nothing wrong with your disks, so perhaps that is why you weren't notified. I would forget about that for now, and worry about your problem.
Your errors are all checksum errors. Most likely, you have a problem with some critical system component. Start with a memory test...
Three things I know determine the spin up:
The access patterns of the file reads, which you can't change.
The difficulty or ease in reading the disk at higher speeds, which you usually can't change.
On older IDE systems, if the IDE is in PIO mode instead of DMA, it will often not spin up. On...
always try -fF first before -fFX. But I would think in either case, 11 hours means it isn't working. Hit reset.
Was the system off when you changed out the drives? Can you start it back up with the bad drive?
Do you have an extra port to let you add the replacement drive without removing the...
Here is another question. If the JoeComp position is right, that this has always been a potential problem, then why do they pick the year 2014 to fix it? Are hard drives about to become more fragile?
Yes, I agree. But will there be no visible evidence of 1000G passing through the corner? That is where I think people get lost, thinking their drive can be damaged in shipping (i.e. taking 300G+) and having no visual sign of it.
The drive shells appear to have mounting holes drilled out, so...
That depends on whether we're talking about the running hard drive, or the non-running. If the running, yes, obviously, great care should be taken or you could exceed the running G-limit as you describe.
The main point is that for non-running drives the G-limit is so far up there that it...
I found this experiment that measured the G forces on a shipped package. Looks pretty mild:
http://www.popularmechanics.com/technology/gadgets/tests/which-shipping-company-is-kindest-to-your-packages
For those who don't want to read it all, they didn't consider it worth measuring over 6G...
Here is a serious question:
What kind of damage do you think happens when NewEgg ships a hard drive the 'traditional' way? Describe it. Explain it. Keep in mind the heads are parked and can not move across the platters. The platters are designed to spin at 5900RPM and are going 0.
I...
It is probably fine. Seagate drives show big numbers on some things, so you can't directly use the raw value. The raw value is actually two numbers in one, and one of them is a counter of all the activity, not just errors.
Although, I did just compare that to a SATA Seagate. Maybe you...
Did you have partitions on your ZFS drives? If so, maybe those are missing or changed, so that your old ZFS metadata has been 'hidden' by the shift?
On each of your former drives, try this:
head -c10000000 /dev/sdb |strings | egrep "(vdev|guid|create|metaslab|backup)"
If some interesting...
You mention SFV and CRC errors on downloads. Are these stored on the ZFS? Are they stored through the expander?
If they are on the ZFS, then I'd say you have mobo problems(or PSU).
If not on the ZFS, but on the expander, then it is PSU, SAS cables, or the expander itself.
I'm not...