Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Handpicked deals...
$2399 $2159
SAVE $240

$200 $160
SAVE $40

$1499 $1148
SAVE $351

$590 $472
SAVE $118

$1299 $997
SAVE $302

$1199 $1015
SAVE $184

$1480 $1230
SAVE $250

$3999 $2499
SAVE $1500

$1498 $1098
SAVE $400

$2897 $1797
SAVE $1100

$399 $399
SAVE $0

$899 $699
SAVE $200

$3297 $1897
SAVE $1400

$749 $499
SAVE $250

$799 $567
SAVE $232

$870 $749
SAVE $121

$3499 $2199
SAVE $1300

$3599 $2299
SAVE $1300

$4499 $2650
SAVE $1849

$750 $600
SAVE $150

$899 $699
SAVE $200

$799 $729
SAVE $70

$3599 $2299
SAVE $1300

$3499 $2199
SAVE $1300

$4499 $2650
SAVE $1849

$1997 $897
SAVE $1100

$3099 $2499
SAVE $600

$2799 $2199
SAVE $600

$4999 $4599
SAVE $400

$4499 $2650
SAVE $1849

Memory Upgrades for 2019 Mac Pro - Save Up to 65% vs Factory Costs
Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).


Using High Capacity Drives as RAID-4 / RAID-5, Multiple Volumes

Last updated 2015-11-11 - Send Feedback
Related: backup, hard drive, HGST, RAID, RAID-4, RAID-5, SoftRAID, storage

Get HGST 8TB Ultrastar He8 Hard Drive at OWC.
Also utilized in the 32TB OWC Thunderbay 4 RAID-5 edition.

See the topology overview which discusses general considerations in using four or five or more large hard drives.

Questions? One-on-one consulting is available with Lloyd.

Example: three ~10TB volumes using five 8TB hard drives

This configuration requires two OWC Thunderbay 4 units, since one unit houses four drives, and there are five drives involved.

This example could be extended to six or move drives for the RAID, but by intention that is not chosen. Instead, those three additional drive slots in the 2nd Thunderbay can be utilized for single-drive nearline (always attached) daily clone backups, e.g., volumes MainClone, VideoClone, ArchivedClone corresponding to the Main, Video, Archived master volumes.

The use of 10TB volumes using five drives is a forward-looking configuration that anticipates 10TB hard drives. By using five 8TB drives, three ~10TB volumes can be created which then match in capacity for clone backups, anticipating reasonably priced 10TB drives 12-18 months later. Since capacity usage is not likely to exceed 8TB over that time (for your author’s system), this strategy delivers both (a) higher performance from 5 drives instead of 4 and (b) 2+ years before the capacity has to be increased again.

The multi-volume approach has a distinct advantage when it comes to backup: single drives of lower-capacity can be used so long as the data fits, e.g., 5TB or 6TB drives until such time as the master volume exceeds that usage. Moreover, if one of the volumes is not in use (future capacity), it need not be backed-up at all.

Only volumes that have changed content need be backed up again. Here, Archive might not change for long periods, since presumably it is older material that is not being modified. Thus, backup can be optimized by not needlessly iterating over 10/15/20 TB of data.

TIP: use diglloydTools IntegrityChecker to verify backup integrity.

Finder Info for four ~10TB RAID-4 volumes via SoftRAID, using five HGST Ultrastar He8 8TB hard drives
SoftRAID view of Four ~10TB RAID-4 volumes via SoftRAID, using five HGST Ultrastar He8 8TB hard drives
New Mac Pro?

Or iMac 5K or iMac Pro?
Consult with Lloyd ASAP before buying!


System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow

Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!

Remote screen sharing available for RAID, software configuration, etc.

More about 2019 Mac Pro vs iMac 5K vs iMac Pro...


Deals Updated Daily at B&H Photo
View all handpicked deals...

SanDisk 512GB Extreme PRO UHS-I SDXC Memory Card
$200 $160
SAVE $40

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__