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#datastorage

2 posts2 participants0 posts today

So, it seems that my 2.5 yo Seagate Exos X20 drives are reporting some quite insane read amounts:

Device Statistics (GP Log 0x04)
Page Offset Size Value Flags Description
0x01 ===== = = === == General Statistics (rev 1) ==
0x01 0x008 4 24 --- Lifetime Power-On Resets
0x01 0x010 4 22429 --- Power-on Hours
0x01 0x018 6 76426225523 --- Logical Sectors Written
0x01 0x020 6 667681744 --- Number of Write Commands
0x01 0x028 6 48054400526096 --- Logical Sectors Read
0x01 0x030 6 2915801075 --- Number of Read Commands

If those numbers would be correct that'd mean the drive would have been reading average 304 MB/s for the whole 2.5 year lifetime. I find this somewhat implausible. The drives max out around 285 MB/s with sequential read.

Did I hear "But surely Seagate's own openSeaChest drive utilities are better and report the correct values!" from the crowd?

Here's the relevant part from openSeaChest_Info -i:

Annualized Workload Rate (TB/yr): 9624.71
Total Bytes Read (PB): 24.60
Total Bytes Written (TB): 39.13

So, equally confused.

EDIT: Earlier I confused some numbers due to PB vs PiB being so different.

Welp. We just had a #SeagateExos #20TB die on us in a spectacular way.

It's not just dead. It's *really* dead. ZFS refused to actually replace it, and the drive wouldn't power on.

Luckily, I had a spare. So now it's resilvering and our 539 TB of used data is safe (assuming nothing else dies)

I'm in line for an #RMA because it was new in 2023. Of all the drives we've had in our video server, this is the... fourth I think to die since 2015.

off to RMA the bugger, then.

An Entire Book Was Written in DNA—and You Can Buy It for $60

wired.com/story/entire-book-wr

"What may be the first commercially available book saved in DNA is the latest example of how consumers might use molecular data storage."

Wonder if DNA is already covered by German National Library's Collection Mandate (dnb.de/EN/Professionell/Sammel; @DNB_Aktuelles) ;)

WIRED · An Entire Book Was Written in DNA—and You Can Buy It for $60By Emily Mullin

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