October 13, 20178 yr https://www.anandtech.com/show/11925/western-digital-stuns-storage-industry-with-mamr-breakthrough-for-nextgen-hdds Quote Yesterday, Western Digital announced a breakthrough in microwave-assisted magnetic recording (MAMR) that completely took the storage industry by surprise. The takeaway was that Western Digital would be using MAMR instead of HAMR for driving up hard drive capacities over the next decade. ... Quote Western Digital sees plenty of value in MAMR, and it is not hard to see why. MAMR technology allows for the bit densities of individual platters to scale to more than 4 Tb/sq.in. WD believes that it is well-positioned to bring 40TB drives by 2025 using MAMR alone. Edited October 13, 20178 yr by johnnie.black
October 13, 20178 yr 21 minutes ago, miniwalks said: Sh!t a brick! Sent from my iPhone using Tapatalk HaHa yeah especially when one shits the bed right out of warranty unlikely these things will be cheap
October 13, 20178 yr HaHa yeah especially when one shits the bed right out of warranty unlikely these things will be cheapMAMR Price will be similar to PMR drives if you believe WD as it’s heavily based on PMR with a small tweak. Whereas HAMR was a completely different architecture and highly costly to re tool for. Sent from my iPhone using Tapatalk
October 13, 20178 yr 1 minute ago, miniwalks said: MAMR Price will be similar to PMR drives if you believe WD as it’s heavily based on PMR with a small tweak. Whereas HAMR was a completely different architecture and highly costly to re tool for. Sent from my iPhone using Tapatalk Yeah I was thinking more along the lines of not cheap and a hell of a lot of lost data if it is a catastrophic failure
October 13, 20178 yr Yeah I was thinking more along the lines of not cheap and a hell of a lot of lost data if it is a catastrophic failureYeah, higher capacity drives are causing more problems for RAID and other Parity systems than anything at the moment. My 8TB drives took 17hrs flat out to do a rebuild, fortunately I don’t run any arrays with less than Dual Parity, whether it’s UnRAID with Dual Parity or RaidZ2 or even RaidZ3 for my critical dataSent from my iPhone using Tapatalk
October 13, 20178 yr 50 minutes ago, miniwalks said: Yeah, higher capacity drives are causing more problems for RAID and other Parity systems than anything at the moment. My 8TB drives took 17hrs flat out to do a rebuild, fortunately I don’t run any arrays with less than Dual Parity, whether it’s UnRAID with Dual Parity or RaidZ2 or even RaidZ3 for my critical data Sent from my iPhone using Tapatalk Wow I'll have to keep that in mind I was thinking of moving to higher capacity drives based on the price of shucking one of those external units for its drive but I also would like to have redundancy and add a second parity drive, will probably up my license and just continue to build on what I have will be interesting to hear others regarding these larger drives and their experiences with them, will see!
October 13, 20178 yr Author I have a server with 8TB Seagate Archive disks, parity check/rebuild takes around 16 15H. Edited October 15, 20178 yr by johnnie.black
October 13, 20178 yr Just imaging 3 preclear passes. 8TB Red non-pro take ~112h. 40TB = 23day preclear at that rate
October 14, 20178 yr Author These disks should also be much faster due to the increased platter density, can't guess how much faster, but they probably will be the first disks to really need SATA3 for full performance.
October 15, 20178 yr I have a server with 8TB Seagate Archive disks, parity check/rebuild takes around 16H. That’s about right for mine, it depends how much other work is being done on the system at the timeIn this instance it was steaming full time to multiple end points Sent from my iPhone using Tapatalk
October 19, 20178 yr $25 / TB = $1000. Hot damn. And consider that you'll need to buy two to begin with to make sure the parity drive(s) are big enough.
October 19, 20178 yr Author $25 / TB = $1000. Hot damn. And consider that you'll need to buy two to begin with to make sure the parity drive(s) are big enough. They forecast ~$8/TB by 2025, so $320 for 40TB, not so bad [emoji6]
October 19, 20178 yr Something tells me it will be a long time before we see 8TB drives for 64 dollars. New 1TB drives are still selling for 40-50.
October 19, 20178 yr Author 2 minutes ago, Perforator said: Something tells me it will be a long time before we see 8TB drives for 64 dollars. New 1TB drives are still selling for 40-50. Price per TB favors the larger devices, e.g. currently a 8TB disk is about $25/TB while like you pointed out a 1TB disk is twice that, so if in 2025 a 40TB disk is $8/TB a 5 or 6TB disk should be twice that, so around $100.
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