Data Hoarder

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We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.

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Badblocks'ing a set of 8 drives, one drive is slower then the other seven. Is this an issue? (alien.top)

submitted 11 months ago by [email protected] to c/[email protected]

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Howdy. So I'm in the process of building a new pool for my NAS. I have eight 18tb drives that I've burnin with Spearfoot's disk-burnin-and-testing script from GitHub. Everything has been going smooth so far at 65 hours in. I do have one possible issue however, one of the drives is testing at a slower rate then the others.

90.82% done, 65:24:36 elapsed. (0/0/0 errors)	95.90% done, 65:24:51 elapsed. (0/0/0 errors)	88.11% done, 65:24:43 elapsed. (0/0/0 errors)	53.61% done, 65:24:35 elapsed. (0/0/0 errors)
88.58% done, 65:24:38 elapsed. (0/0/0 errors)	89.32% done, 65:24:49 elapsed. (0/0/0 errors)	88.89% done, 65:24:46 elapsed. (0/0/0 errors)	94.82% done, 65:24:37 elapsed. (0/0/0 errors)

So these look good so far, the majority of the drives which are chugging along within + or - 5% of one another. While that top right drive that has fallen behind and is now -40% behind its peers and it continues to slowly fall away from the pack.

So my question is does this drive have an issue where its running at a slower speed to its peers or is this nothing to worry about? Once the burnin has finished I was thinking I would speed test each drive and see if anything shows up.

Any ideas or comments?

Thanks all.

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[–] [email protected] 1 points 11 months ago

grep dmesg and see if the link is at sataII speeds, if so its almost certainly the cable. If not, still might be ok. Your motherboards IC may perfer some sata ports over others when its at its limit. Remember it likely runs on a 1x pcie bus back to the system bus which is ~ 800MB/s. You have 8 drives so...

Only panic when there isnt a lot of data being pushed and the drive still performs badly and you have replaced cable