TweetFollow Us on Twitter

ATTO ExpressPCI UL4S and ExpressPCI UL4D SCSI Adapters

Volume Number: 22 (2006)
Issue Number: 04
Column Tag: Review

ATTO ExpressPCI UL4S and ExpressPCI UL4D SCSI Adapters

Subhead

by MacTech Staff

SCSI on Mac OS X

For those of you who have been around to remember SCSI on early Mac OS X, you'll likely recall that SCSI on Mac OS X 10.0 and 10.1, and even to some extent 10.2, was a nightmare: troublesome, error prone, and unreliable. Ultimately, Apple re-wrote the SCSI implementation, and SCSI on Panther and beyond has worked as it should. It would be a mistake to judge SCSI today by those early experiences.

Today's SCSI Experience

When it comes to SCSI on the Mac, the first name that comes to mind is ATTO. ATTO has a variety of technologies, SCSI and others, and a variety of form factors. In our case, we looked at the single connector ExpressPCI UL4S, and the dual connector ExpressPCI UL4D SCSI adapters.

Simply put, these products provided a very pleasurable experience -- we installed the cards, and they worked. No drivers. No hassles. It just worked, and it worked well.

To be fair, many people may prefer FibreChannel. It all comes down to what you want to connect to, what is available to you, and what you want the future path to be. If you do choose FibreChannel, you should also take a look at what ATTO has to offer as they are strong there as well.

The Details of SCSI

ATTO ExpressPCI UL4S and ExpressPCI UL4D SCSI adapters are part of the Ultra320 SCSI host adapter series for data intensive enterprise servers and high-end workstations running applications such as high-end video editing, database engines, messaging, and web servers. UL4S and UL4D support up to 30 SCSI bus IDs and Low Voltage Differential (LVD) for cabling up to 12.5 meters per bus. Both products are compatible with single-ended SCSI devices, providing cable distances up to 3 meters. UL4S is a single channel Ultra320SCSI, PCI-X host adapter with data transfer rate of 320 MB/sec, whereas UL4D is a dual channel Ultra320SCSI, PCI-X host adapter with data transfer rate of up to 640 MB/sec. UL4S and UL4D are compatible with Mac OS X, Windows Server 2003, Windows XP, Windows 2000, and Linux. Dynamic bus rescan is available for Mac OS X only.

While 3 meters of cable is recommended for most applications, when we did our install, the drive was in the rack, and the PowerMac wasn't. We reached out to see what cables were available in longer lengths. We found the folks at 9 To 5 Computer Supply <www.9to5computer.com> had a 10m (yes, 30 feet) cable, and they sent it over for us to take a look at. 9to5 also has a range of other "toys", new and refurbished, with a focus on mass storage solutions.

We plugged the long cable in, and the throughput was spectacular between the ATTO card and the Quantum SDLT II. Be careful when you order cables as there's a variety of connectors for the SCSI 3. In our case, we needed a VHDCI male to HD68.

UL4D is equipped with two external VHDCI, and two internal high-density 68-pin connectors. It is 6.521 inches in length and 4.450 inches in height. UL4S features one external high-density 68-pin connector, and one internal high-density 68-pin connector. It is 6.521 inches in length and 4.2 inches in height. UL4D is Mac G5 compatible, and it is available as a standalone or part of an ExpressRAID Kit that includes ExpressRAID Software.


ExpressPCI UL4D


ExpressPCI UL4S

The UL4S and UL4D both feature a 64-bit/133 MHz PCI-X bus with compatibility to PCI-X 1.0a and PCI 2.2. Accelerated PCI bus management enables PCI Bus Master rate of 1-GB/sec. UL4S and UL4D can operate in temperature range of 0-45 degrees C, humidity 10-90% non-condensing, and airflow 100 LFM (min). Power rating of both SCSI adapters is 0.75 typical/2.0 max. Amps @ + 5.0 /VDC, and 0.05 Amps @ + 12.0 VDC with PCI signal compatibility of 3.3 Volts/5 Volts. In terms of reliability of these products, MTBF (mean time between failures) is 150,000 hours, and MTTR (mean time to repair) is less than 15 minutes.

Backward Compatibility and Advanced Streaming

While we were focused on SCSI-3 and newer technologies, there are times you want to be able to use older items. ATTO's proprietary Vpath Technology enables the UL4S, and UL4D to offer users the flexibility of connecting high-speed Ultra320 devices externally, and slower legacy devices internally, or vice versa, without compromising on the performance of the high-speed device. Backward compatibility is supported for Ultra 160, Ultra2, Ultra/WIDE, Fast/WIDE and Narrow SCSI devices. The UL4S and UL4D are ASPI (Windows) compatible, RAID ready, PC 99 compliant, plug and play compatible, feature Flash ROM for easy field upgrades, and supports automatic and upper-byte termination for narrow devices.

The Advance Data Streaming (ADS) feature provides controlled acceleration of data transfers utilizing optimized SCSI-3 algorithms, embedded RISC I/O processors for low overhead, and optimized gather/scatter of lists. ADS, facilitates bus mastering eliminating CPU processing time as bottleneck. Tagged command queuing in ADS allows efficient processing of threads, and disconnect/reconnect reduces wait time between transfers.

The UL4S and UL4D also support Ultra320 specific features such as packetized SCSI, read/write data streaming, training patterns, pre-compensation, double transition clocking, Quick Arbitration Select (QAS), Cyclical Redundancy Checking (CRC), Domain Validation (DV), Asynchronous Information Protection (AIP), free-running clock, and flow control. They also support multiple block sizes, and are bootable from attached disks.

UL4S and UL4D come with ATTO ExpressPro-Tools and ATTO Configuration Tool formatting, and utility software. UL4S and UL4D are priced at $349 and $499 respectively. Both products are RoHS compliant (2002/95/EC).

Avalable at http://www.attostore.com


MacTech Staff

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

WALTR 2 2.0.9 - $39.95
WALTR 2 helps you wirelessly drag-and-drop any music, ringtones, videos, PDF, and ePub files onto your iPhone, iPad, or iPod without iTunes. It is the second major version of Softorino's critically-... Read more
Paperless 2.3.9 - $49.95
Paperless is a digital documents manager. Remember when everyone talked about how we would soon be a paperless society? Now it seems like we use paper more than ever. Let's face it - we need and we... Read more
Adobe After Effects CC 2017 14.1 - Creat...
After Effects CC 2017 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous After Effects customer). The new, more connected After Effects CC... Read more
Adobe Premiere Pro CC 2017 11.0.2 - Digi...
Premiere Pro CC 2017 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Premiere Pro customer). Adobe Premiere Pro CC 2017 lets you edit... Read more
ExpanDrive 5.4.4 - Access cloud storage...
ExpanDrive builds cloud storage in every application, acts just like a USB drive plugged into your Mac. With ExpanDrive, you can securely access any remote file server directly from the Finder or... Read more
Apple Final Cut Pro X 10.3.1 - Professio...
Apple Final Cut Pro X is a professional video editing solution.Completely redesigned from the ground up, Final Cut Pro adds extraordinary speed, quality, and flexibility to every part of the post-... Read more
Apple GarageBand 10.1.5 - Complete recor...
The new GarageBand is a whole music creation studio right inside your Mac -- complete with keyboard, synths, orchestral and percussion instruments, presets for guitar and voice, an entirely... Read more
Yummy FTP Pro 1.11.14 - $29.99
Yummy FTP Pro is an advanced Mac file transfer app which provides a full-featured professional toolkit combined with blazing speeds and impeccable reliability, so whether you want to transfer a few... Read more
Apple Compressor 4.3.1 - Adds power and...
Compressor adds power and flexibility to Final Cut Pro X export. Customize output settings, work faster with distributed encoding, and tap into a comprehensive set of delivery features. Features... Read more
Apple Motion 5.3.1 - Create and customiz...
Apple Motion is designed for video editors, Motion 5 lets you customize Final Cut Pro titles, transitions, and effects. Or create your own dazzling animations in 2D or 3D space, with real-time... Read more

Super Mario Run dashes onto Android in M...
Super Mario Run was one of the biggest mobile launches in 2016 before it was met with a lukewarm response by many. While the game itself plays a treat, it's pretty hard to swallow the steep price for the full game. With that said, Android users... | Read more »
WarFriends Beginner's Guide: How to...
Chillingo's new game, WarFriends, is finally available world wide, and so far it's a refreshing change from common mobile game trends. The game's a mix of tower defense, third person shooter, and collectible card game. There's a lot to unpack here... | Read more »
Super Gridland (Entertainment)
Super Gridland 1.0 Device: iOS Universal Category: Entertainment Price: $1.99, Version: 1.0 (iTunes) Description: Match. Build. Survive. "exquisitely tuned" - Rock Paper Shotgun No in-app purches, and no ads! | Read more »
Red's Kingdom (Games)
Red's Kingdom 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Mad King Mac has kidnapped your father and stolen your golden nut! Solve puzzles and battle goons as you explore and battle your... | Read more »
Turbo League Guide: How to tame the cont...
| Read more »
Fire Emblem: Heroes coming to Google Pla...
Nintendo gave us our first look at Fire Emblem: Heroes, the upcoming mobile Fire Emblem game the company hinted at last year. Revealed at the Fire Emblem Direct event held today, the game will condense the series' tactical RPG combat into bite-... | Read more »
ReSlice (Music)
ReSlice 1.0 Device: iOS Universal Category: Music Price: $9.99, Version: 1.0 (iTunes) Description: Audio Slice Machine Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or... | Read more »
Stickman Surfer rides in with the tide t...
Stickson is back and this time he's taken up yet another extreme sport - surfing. Stickman Surfer is out this Thursday on both iOS and Android, so if you've been following the other Stickman adventures, you might be interested in picking this one... | Read more »
Z-Exemplar (Games)
Z-Exemplar 1.4 Device: iOS Universal Category: Games Price: $3.99, Version: 1.4 (iTunes) Description: | Read more »
5 dastardly difficult roguelikes like th...
Edmund McMillen's popular roguelike creation The Binding of Isaac: Rebirth has finally crawled onto mobile devices. It's a grotesque dual-stick shooter that tosses you into an endless, procedurally generated basement as you, the pitiable Isaac,... | Read more »

Price Scanner via MacPrices.net

Apple Ranked ‘Most Intimate Brand’
The top ranked ‘”intimate” brands continued to outperform the S&P and Fortune 500 indices in revenue and profit over the past 10 years, according to MBLM’s Brand Intimacy 2017 Report, the largest... Read more
B-Eng introduces SSD Health Check for Mac OS
Fehraltorf, Switzerland based independant Swiss company- B-Eng has announced the release and immediate availability of SSD Health Check 1.0, the company’s new hard drive utility for Mac OS X. As the... Read more
Apple’s Education discount saves up to $300 o...
Purchase a new Mac or iPad using Apple’s Education Store and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free: -... Read more
4-core 3.7GHz Mac Pro on sale for $2290, save...
Guitar Center has the 3.7GHz 4-core Mac Pro (MD253LL/A) on sale for $2289.97 including free shipping or free local store pickup (if available). Their price is a $710 savings over standard MSRP for... Read more
128GB Apple iPad Air 2, refurbished, availabl...
Apple has Certified Refurbished 128GB iPad Air 2s WiFis available for $419 including free shipping. That’s an $80 savings over standard MSRP for this model. A standard Apple one-year warranty is... Read more
13-inch 2.7GHz Retina MacBook Pro on sale for...
B&H Photo has the 2015 13″ 2.7GHz/128GB Retina Apple MacBook Pro on sale for $100 off MSRP. Shipping is free, and B&H charges NY tax only: - 13″ 2.7GHz/128GB Retina MacBook Pro (MF839LL/A): $... Read more
Laptop Market – Flight To Quality? – The ‘Boo...
Preliminary quarterly PC shipments data released by Gartner Inc. last week reveal an interesting disparity between sales performance of major name PC vendors as opposed to that of less well-known... Read more
IBM and Bell Transform Canadian Enterprise Mo...
IBM and Bell Canada have announced they are joining forces to offer IBM MobileFirst for iOS market-ready enterprise applications for iPad, iPhone or Apple Watch. Bell, Canada’s largest communications... Read more
Otter Products is Closing… For a Day of Givin...
On Thursday, Feb. 9, Otter Products is closing doors to open hearts. In partnership with the OtterCares Foundation, the company is pausing operations for a day so all employees can volunteer with... Read more
15-inch 2.2GHz Retina MacBook Pro on sale for...
Amazon has 2015 15″ 2.2GHz Retina MacBook Pros (MJLQ2LL/A) available for $1799.99 including free shipping. Apple charges $1999 for this model, so Amazon’s price is represents a $200 savings. Read more

Jobs Board

Senior Workstation Administrator - *Apple*...
…with extraordinary HR. QualificationsJOB SUMMARY/OVERVIEWThe Senior Workstation Administrator - Apple supports the mission of TriNet by providing advanced level Read more
Intermediate *Apple* macOS Systems Integrat...
**Position Summary:** SC3 is actively seeking an Intermediate Apple macOS systems integration administrator that will be responsible for providing Apple Mac Read more
*Apple* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Los Angeles, CA Introduction: We have immediate job openings for several Desktop Support Technicians with one of our Read more
*Apple* Retail - Multiple Positions - Apple,...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
*Apple* Retail - Multiple Positions (Multi-L...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.