All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com

Thank you for buying via links and ads on this site,
which earn me advertising fees or commissions.
As an Amazon Associate I earn from qualifying purchases.

Other World Computing...
B&H Photo...
Amazon
As an Amazon Associate I earn from qualifying purchases.
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$209 $129
SAVE $80

$91 $40
SAVE $51

$3049 $2399
SAVE $650

$3508 $2998
SAVE $510

$1849 $1199
SAVE $650

$998 $848
SAVE $150

$3999 $2998
SAVE $1001

$2299 $1799
SAVE $500

$1597 $1297
SAVE $300

$80 $33
SAVE $46

$2299 $1799
SAVE $500

$1898 $1498
SAVE $400

$2799 $2299
SAVE $500

$2299 $1799
SAVE $500

$600 $400
SAVE $200

$240 $175
SAVE $65

$699 $499
SAVE $200

$400 $300
SAVE $100

$1599 $1398
SAVE $201

$2042 $1597
SAVE $445

$1699 $999
SAVE $700

$180 $100
SAVE $80

$1199 $1099
SAVE $100

$1199 $1099
SAVE $100

$999 $949
SAVE $50

$1849 $1199
SAVE $650

$400 $300
SAVE $100

$1699 $999
SAVE $700

Upgrade the memory of your 2020 iMac up to 128GB

Housing Data Safely: Dual OWC Thunderbay 4-Bay Units for Performance, Capacity, Redundancy, Backup

With dual OWC Thunderbay units attached to the 2013 Mac Pro, eight 4TB drives can be housed in a way that offers cross-redundancy for “master” (original) and always-attached nearline backups.

With dual Thunderbay units housing eight drives I can house all my original image files and similar (Archive0, Archive1) as well as keep clone backups of both of those as well as my Boot and Master volumes*, and a TimeMachine volume too. Moreover, each archive volume can be a dual drive RAID-0 stripe for high performance in both usage and backup and verification time.

Boot = system and applications, miscellaneous data
Master = current projects (past 6 months or so), high performance SSD
Archive0 = oldest projects
Archive1 = next oldest project
... etc

Many users don’t have enough data to require additional archive volumes housing older data, so this simplifies to Boot and Master, with respective backups.

* Online always attached backups are not a substitute for other detached backups stored safely away from the computer. MPG keeps both nearline and separate backups to address both the “I’m too busy to go get those backup drives” and the worst-case “everything attached is stolen/burned up” scenarios.

When the data grows too large

When Master nears capacity, the concept needs to be extended to Archive1, Archive2, etc (your choice of naming convention). Each of these can be backed-up by cloning to single (non RAID) external drives.

The structure can be extended indefinitely without requiring any new mental model. MPG deems this far preferable to larger and larger and more expensive 4/6/8 bay units; these generate the same issues for backup, and end up being more complex, not less.

Configuring the dual Thunderbays

By using dual Thunderbay units, I can “cross configure” so that each Thunderbay houses some originals and some backups, so that if one unit were to fail, the loss would affect some originals and some backups, but the other unit would have a backup of what was lost. Note that a lightning strike or other hazard could take out both units (and the computer), so this approach is NOT a subsitute for additional backups out of harm’s way.

An approach equivalent to this is mandatory as a professional competence issue for anyone whose livelihood depends on data safety. Consulting can walk you through a suitable approach tailored to current and growing needs.

Simplified (omitting Boot and Master):

Unit #1: Archive0, Archive1.Clone
Unit #2: Archive0.Clone, Archive1

A failure of Unit #1 leaves intact copies on Unit #2, and vice versa. Perfect.

The MPG system has a lot of data to house and it’s growing steadily, so more volumes are required, but the concept is unchanged:

Internal SSD: Master, Boot
Unit #1: Archive0, Archive1.Clone, Master.Clone1, Boot.Clone1
Unit #2: Archive0.Clone, Archive1. Master.Clone2, Boot.Clone1

Don’t forget that data validation is an essential part of any backup system. Assuming that backups are intact is a fundamental error.

OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
Thunderbolt 4 Dock

Thunderbolt 4 hub and ports!

Any Mac with Thunderbolt 3.


OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
OWC Envoy Pro Elektron

Ultra-high performance across entire capacity, outperforms the competition.

Tiny, bus-powered, rugged, compact!


√ No more slow and noisy hard drives!
View all handpicked deals...

Pelican 7000 LED Flashlight v2 (Black)
$91 $40
SAVE $51

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__