continuum

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  1. Does your backplane actually have a SAS expander chip in it? Or is it just a backplane? If the backplane is just a plain backplane then using the correct cables should work. If your backplane actually has a SAS expander chip in it, then you would need to make sure your new HBA is compatible with the SAS expander chip in the backplane, and you would be limited by connection speeds supported by the backplane's SAS expander.
  2. Or thousands. My last quote from OnTrack to recover, I think it was 20GB off a failed drive like this, was something like $1800...
  3. Dropped it means crashed heads... you're SOL. If you plan to send it for professional recovery do NOT open it. You're only risking further damage to the drive to zero additional benefit.
  4. IIRC the only one with enough data to be statistically relevant (and even some of their collections of specific models it isn't really large enough to be relevant) is Backblaze... https://arstechnica.com/information-technology/2017/01/8tb-hgst-disks-show-top-reliability-racking-up-45-years-without-failure/ They only have a tiny, tiny handful of enterprise disks that are helium filled so don't read too much into it, but between Backblaze data and what we are seeing, I'm not seeing any concern for long-term reliability of helium filled disks.
  5. Are you showing a signature collision or something else? If it's a signature collision you can use DISKPART from the command line to change the signature.
  6. Were the initial scans on the affected drive still trying to finish? I know we've encountered that a few times from customers-- the initial scan/initial index/whatever was still running before the customer pushed the unit into production....
  7. Under what circumstances? Things like data retention are extremely temperature dependent. Hence why the NAND spec itself is not that important, the environment and application it's going to be used in is hugely important. http://www.samsung.com/us/business/oem-solutions/pdfs/V-NAND_technology_WP.pdf Shows a massive difference in the duration spec'ed for data retention-- the high temperature test is 13 hours at 85C, the low temperature test is 500 hours at 25C (note that that's just the testing, not the actual spec'ed retention of the NAND). https://www.micron.com/about/blogs/2015/may/addressing-data-retention-in-ssds " The JEDEC specification for data retention tells us that for enterprise storage devices, data retention at the end of the service life shall be at least three months (stored at 40°C). For SSDs in the client computing market, data retention shall be at least one year after the drive’s service life (assuming it’s stored at 30°C). " https://www.micron.com/products/nand-flash/3d-nand Shows 0C to +70C.
  8. That would be up to the aerospace and defense application vendor designing the spec. I think you'd want to ask them, not the SSD maker...:P
  9. Does defragmenting the drive help?
  10. Toshiba has some SSHD's too, but I think they're also 5400rpm. You're probably SOL unless you want an old model like the Momentus XT, and given the areal density improvements in newer drives, a newer 5400rpm drive is almost certainly faster than an older 7200rpm drive with lower areal density. Toshiba product page for Toshiba's SSHD's: http://toshiba.semicon-storage.com/us/product/storage-products/client-sshd/mq02abxxxxh.html SR benchmarks of an old (circa 2013) Seagate Momentus Thin vs. the even older Momentus XT... note in actual application traces, the Momentus Thin is faster... the newest one is the Seagate FireCuda, but I'm not seeing any reviews yet... http://www.storagereview.com/seagate_sshd_thin_review_gen3_500gb_st500lm000 The current (circa 2015) Seagate Laptop SSHD 1TB smokes the 750GB one in desktop benchmarks, but I think it's now technically one generation behind the Seagate FireCuda 2.5" line. http://www.storagereview.com/seagate_laptop_sshd_1tb_review
  11. http://www.hgst.com/products/hard-drives/desktop-drive-kits Part numbers are in one of the tabs on that page. Performance differences on modern 1TB/platter+ drives are pretty modest, I wouldn't stress too much if it's a 5400rpm vs a 7200rpm drive unless lots of small files are involved.
  12. You haven't given nearly enough work-load-specific information... but 99% of desktop won't see the difference. It's safe to say you're in that 99%.
  13. Legacy is not UEFI. You should have seen both a UEFI and a Legacy option in the system boot menu. Heck I just setup a Z440 a few months ago, unfortunately I no longer have access to that box so I can't take any screenshots for you.