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.
Upgrade the memory of your 2020 iMac up to 128GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$1199 $779
SAVE $420

$249 $219
SAVE $30

$1699 $1299
SAVE $400

$1499 $1149
SAVE $350

$200 $140
SAVE $60

$89 $69
SAVE $20

$120 $35
SAVE $85

$209 $179
SAVE $30

$3498 $3498
SAVE $click

$3699 $1299
SAVE $2400

$1000 $700
SAVE $300

$3899 $1499
SAVE $2400

$748 $648
SAVE $100

$2999 $1999
SAVE $1000

$1699 $999
SAVE $700

$1698 $1398
SAVE $300

$4499 $3499
SAVE $1000

$1399 $1049
SAVE $350

$1149 $799
SAVE $350

$1399 $1049
SAVE $350

$1498 $1198
SAVE $300

$2797 $2597
SAVE $200

$280 $250
SAVE $30

$1699 $1299
SAVE $400

$8399 $7599
SAVE $800

$899 $799
SAVE $100

$1499 $999
SAVE $500

$1699 $1299
SAVE $400

diglloydTools Updated to v 2.2.15, IntegrityChecker Sees up to 38% Speed Improvement

Need help deciding on a Mac? Lloyd offers one-on-one consulting on choosing the best Mac and its best configuration, backup protocol, displays, storage and RAID, etc.

Get diglloydTools and please consider subscribing to my photographic publications also.

Update: icj (Java version of IntegrityChecker is now up to 50% faster on very fast SSDs).

diglloydTools

diglloydTools works fine with macOS High Sierra—no known issues, and no update was needed.

This is a minor update unless it matters to you in which case it is a nice bump up in speed; see the release notes. Current diglloydTools customers can download the update.

There is a cross-platform Java-based version of IntegrityChecker included (works on Windows, Linux, NAS OS, any operating system with Java). The existing native IntegrityChecker remains; the Java-based version is included in addition.

The only significant changes is that diglloydTools IntegrityChecker is now up to 38% faster on drives that offer at least 1.6 GB / sec transfer speed. Full performance gains in IntegrityChecker require at least 2.4 GB/sec which is darn fast, but the 2017 iMac 5K with its 3 GB/sec SSD benefits, as well as the 2016/2017 MacBook Pro models. Or any machine with fast enough disk I/O to keep the CPU cores busy. An 8-core machine will need something like 4.5 GB/sec, since IntegrityChecker is as efficient as it gets for disk I/O and CPU core usage on the Mac. This all relates to yesterday’s CPU core discussion.

There was no actual processing code optimization; IntegrityChecker has been capable of the same speed for years via the --num-threads option at the command line. What has changed is that more threads are now used by default, one for each virtual CPU core instead of one for each real CPU core. There was not much point in doing this prior to the advent of SSDs capable of speeds approaching 3GB/sec.

Examples: speed on the 2017 iMac 5K

Shown below, the 2017 iMac 5K with its 3 GB/sec SSD offers enough I/O bandwidth to keep IntegrityChecker busy with 8 threads, going at 2282 MiB/sec = 2390 MB/sec. The limitation here is CPU cores (4 real, 8 virtual). IntegrityChecker could use more CPU power. Also, other background applications consume some of the available CPU cycles.

diglloydTools IntegrityChecker using all CPU cores
diglloydTools IntegrityChecker using all CPU cores

Below, a relatively slow hard-drive based RAID-0 stripe can only be read at about 677 MiB/sec = 710 MB/sec. There are plenty of CPU cycles left over going unused—4 CPU cores are ample for this scenario.

diglloydTools IntegrityChecker not using all CPU cores — faster drive needed
diglloydTools IntegrityChecker not using all CPU cores — faster drive needed

Some of the other capabilities in diglloydTools

Aside from testing hard drive or SSD or RAID performance and reliability with DiskTester, data integrity with IntegrityChecker is a must-have workflow tool for anyone with important data:

OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
OWC Envoy Express

World’s first Thunderbolt 3 M.2 NVME SSD enclosure.

Super fast, bus-powered, 3.3 oz, DIY easy, rugged and compact!


See also OWC Express 4M2
√ No more slow and noisy hard drives!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
View all handpicked deals...

LG UM7370PUA 70" Class HDR 4K UHD Smart LED TV
$1199 $779
SAVE $420

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__