All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com
Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Capacities up to 48TB and speeds up to 1527MB/s

HGST 8TB Ultrastar He8: RAID-4, RAID-0, RAID-5 Scalability

Get HGST 8TB Ultrastar He8 or HGST 6TB Deskstar NAS hard drives alone or in the OWC Thunderbay 4 RAID-5 edition.

See the MPG in-depth review of the HGST 8TB Ultrastar He8 enterprise-grade hard drive.

RAID-4/5 declines in write performance starting at 7 drives, even on an 8-core 3.3 GHz Mac Pro. Note that machines with fewer CPU cores and/or one Thunderbolt 2 bus (anything but Mac Pro) might do less well than shown here (TBD). It may be a good reason for professionals to stick with at least a 6-core Mac Pro.

RAID-0 striping shows a dropoff at 8 drives also. While there is one laggard in this batch of 8, this is probably not the issue. However, MPG will be retesting the 8-drive scenario with a replacement drive that is coming.

The differences between RAID-4 and RAID-5 are less than the normal variation having to do with drive behaviors, hence one cannot conclude (conclusively) that RAID-4 is faster. However, past testing has consistently shown a slight advantage for read speeds with RAID-4.

Performance of HGST 8TB Ultrastar He8 using up to 8 drives in RAID
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 19 hours unless noted. Certain deals may last longer.
$3199 SAVE $200 = 5.0% $99 FREE ITEMS Canon EOS R Mirrorless with 24-105mm in Cameras: Mirrorless
$1632 SAVE $700 = 28.0% $165 GIFT CARD LG C8PUA 55" Class HDR UHD Smart OLED TV in Electronics: Televisions
$3097 SAVE $200 = 6.0% $77 FREE ITEMS Nikon D850 DSLR in Cameras: DSLR
$1797 SAVE $200 = 10.0% Pentax K-1 Mark II DSLR in Cameras: DSLR
$998 SAVE $400 = 28.0% Sony a7 II Mirrorless in Cameras: Mirrorless
$1798 SAVE $200 = 10.0% Sony a7R II Mirrorless in Cameras: Mirrorless
$3998 SAVE $500 = 11.0% Sony a9 Mirrorless in Cameras: Mirrorless
$5987 SAVE $1839 = 23.0% ZEISS Loxia 5-Lens Bundle in Lenses: Mirrorless
$11594 SAVE $3157 = 21.0% ZEISS Otus ZF.2 3-Lens Bundle in Lenses: DSLR

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__