Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Shehbaz Jaffer
Hi, I was wondering what cost advantage do SMR drive provide as compared to normal CMR drive? 8TB SMR drive - $ 260 3TB CMR (Conventional Magnetic Recording drive) - $ 105 Is the 8TB SMR drive that you mentioned in another post on this mailing list host or drive managed? I was curious to know

Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Dieter BSD
You can also find these drives inside the STDT8000100 external USB unit for a bit more at $300. It may or may not be the same. There are stories that it is difficult or impossible to talk directly to the drives in recent USB units without the usb-to-sata bridge. I have yet to find a

Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread InterNetX - Juergen Gotteswinter
-freebsd-hardw...@freebsd.org [mailto:owner-freebsd-hardw...@freebsd.org] On Behalf Of Tom Evans Sent: Tuesday, March 24, 2015 12:39 PM To: Shehbaz Jaffer Cc: FreeBSD FS; grarpamp; freebsd-hardware@freebsd.org Subject: Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS On Tue, Mar 24, 2015

RE: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Michael Jung
Of InterNetX - Juergen Gotteswinter Sent: Tuesday, March 24, 2015 1:42 PM To: FreeBSD FS; freebsd-hardware@freebsd.org Subject: Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS The HGST He8 HDDs completed its rebuild in 19 hours and 46 minutes. The Seagate Archive HDDs completed their rebuild in 57

Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Shehbaz Jaffer
'host aware' or 'host managed' SMR drives open the real possibilities for use under ZFS and other file systems. Agreed. Probably RAID is not the way to go then. In host managed SMR drives one could use other form of resiliency (Erasure Codes) rather than RAID. We do not rebuild the whole disk

Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Tom Evans
On Tue, Mar 24, 2015 at 12:47 PM, Shehbaz Jaffer shehbazjaffer...@gmail.com wrote: Hi, I was wondering what cost advantage do SMR drive provide as compared to normal CMR drive? 8TB SMR drive - $ 260 3TB CMR (Conventional Magnetic Recording drive) - $ 105 Purchase price is not irrelevant,

RE: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Dale Kline
Commands ZBC/ZAC, Shingled SMR drives, ZFS On Tue, Mar 24, 2015 at 12:47 PM, Shehbaz Jaffer shehbazjaffer...@gmail.com wrote: Hi, I was wondering what cost advantage do SMR drive provide as compared to normal CMR drive? 8TB SMR drive - $ 260 3TB CMR (Conventional Magnetic Recording drive

Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-24 Thread Don Lewis
On 24 Mar, InterNetX - Juergen Gotteswinter wrote: The HGST He8 HDDs completed its rebuild in 19 hours and 46 minutes. The Seagate Archive HDDs completed their rebuild in 57 hours and 13 minutes this is ... a feature. right? Looks like the HGST He8 drives cost about $600 though ... The He10

Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS

2015-03-12 Thread grarpamp
Here is a performance review of the ST8000AS0002 non-SED drive managed model (caveat your actual expected usage). http://www.storagereview.com/seagate_archive_hdd_review_8tb You can also find these drives inside the STDT8000100 external USB unit for a bit more at $300.