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About twistedemotions

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  1. twistedemotions

    Seagate to Acquire Maxtor!

    I'm doubting any speed improvements from using assembly are worthwhile in hard drive firmware anymore. We are talking about hard-drives here which have significant physical limitations, not a program running on the cpu/ram. 10% faster firmware isn't going to matter when you you have a seek speed in the nanoseconds and RPM limits.
  2. twistedemotions

    Techreport Tests Raid Anyone care to comment on the accuracy and test methodology of this article?
  3. "The 2.5 inch Fujitsu drive, based on the speedy serial attached SCSI (SAS) mode of data transfer, is about one-third smaller than its 3.5-inch brother, and should conserve space, power and cost for customers looking for improvements to enterprise-level hard drive storage, according to Joel Hagberg, vice president of OEM Sales and Marketing at San Jose, Calif.-based FCPA. Hagberg said Fujitsu's 2.5-inch drive would offer up to 73.5 gigabytes of storage coupled with a SAS interface capable of a 300 megabyte data transfer rate at a full 3Gb per second. " Don't know if anyone posted this yet, but i thought it was interesting. Hit the link for all the details.
  4. twistedemotions

    Neat stuff on SA-SCSI (SAS)

    I not sure if this has been posted before. But the SCSI Trade Association (SCSITA) has a whole grip load of stuff on the new SAS standard. This one PDF file is quite interesting as it shows how they are going to do the physical connectors and what-not. Looks like 3 gigabits/sec will be the initial speed with 6 gigabits/sec to come shortly afterward. Of course some info thats been around for SATA II also: Laterz fellaz.
  5. Neat little proggy cas! Any chance you could post the source?
  6. Been looking around here and a couple of other forums for an hour or so... seems the MPX chipset is picky about RAID cards (as it seems to be with just about everything else). I could use some help picking out an SCSI RAID card that would work for my setup. Any opinions or information are welcomed. I'll be running 4 drives in RAID5; the drives will probably be Maxtor 10KIV's or cheatah X-15.3's. Due to various physical limitations I need a to use a SINGLE channel RAID card. My instincts are that a single channel Ultra320 card will be needed (which is ok) for this 4 drive array... although would a single Ultra160 channel be sufficient? The card needs to run able to run at 64-bit/66 Mhz (no 32-bit or 33Mhz). Price is no issue and extreme card lengths aren't a problem (though it should only be 1 PCI slot wide). Also if (as I've seen with some of the Ultra320 stuff) waiting is required, I have no problems being deleyed for 3-4 months for card availability. I've searched around in various forum archives and see mostly complaints or reccomendations for RAID-0. Also there is very little talk about any of the more recent cards or the newer U320 models. Anyone have suggestions for a SCSI RAID card? For those who are puzzled about my mentioning of RAID problems with the MPX here is some of the information I have garnered so far... perhaps someone can interpret how it would relate to me? Oh and here is the server setup: AGP & 2x64/66 PCI riser card Intel Pro/1000 XT ethernet controller Geforce 2 MX 200 AGP graphics card 2U rackmount chassis with 4 80mm fans 4x1 GB samsung ECC registered PC2100 2xAMD Athlon MP 2200+ & 2 low-profile heatsinks Tyan TigerMPX S2466N-4M 460W Zippy PFC 2U powersupply Pioneer DVD-106S ATAPI floppy 4 drive SCA backplane w/terminator & high quality cable Thanks ahead of time for any help!
  7. twistedemotions

    Intel Application Accel

    IIA is for all intents and purposes an Intel chipset driver (in particular IDE functionality). It will not fuction with SIS, ALI, VIA, ServerWorks, or AMD chipsets. It also only functions with the "ICH" series of southbridges, so those chipsets predating Intel's move to their "hub architecture" are not compatible (Like the old BX chipset). IOW... Can you use NVIDIA "Detonators" to run your ATI 9700? NO!
  8. twistedemotions

    10Gbit NICs ?

    bah! 10 Gbit ethernet. I won't even bother with Gigabit over fiber. I can just imagine how much a optical switch must cost ($$$$). To much for a home lan. I'll stick with 1 Gbit ethernet over copper and my cheap (comparitively) 8 port Gigabit switch.
  9. twistedemotions

    rack mount server case questions

    Motherboard measurments when layed down flat: Extended ATX (12" x 13") ATX (12” x 9.6”) On average rackmount server chassis are sized like this: 24" deep 1.75" per "U" tall, 19" wide (when measuring from front part where it mounts, 17" elsewhere) I'm not sure a rackmount is your best choice as these chassis are optimized for saving height... so as to stack many servers on top of each other. From what you say height is where where you have the most to give... If height is no issue, why not look for a tall (but not deep) tower chassis and modify as needed? I've seen plenty of cheapo 18" deep towers from antec that can hold 8 drives (if you use some 5.25 adapters) and a CD-ROM that also take full size ATX boards. In regards to having the drives seperate from the system... IDE cables have a length limit of 24"-36" or so... so I can't see someone using standard IDE cables for an external enclosure without hacking something ugly together. The external IDE enclosure (2-10 drives) setups I have seen use USB 2.0 or firewire to overcome IDE length limitations. I haven't ran into any external SATA solutions (and I don't know what its length limitation is) but perhaps in time. You can look at trying this with the external IDE (usually firewire) setups... but i'm guessing the prices will be pretty steep. Never used em myself though... so ask around. Gotta run... Good luck with your media server!
  10. twistedemotions

    SATA-II details (Native Command Queuing), SCSI future stuff

    Cool! someone on another board pointed some stuff out to me. FAQ on Parallel and Serial Attached SCSI: Serial Attached SCSI website Some neat things from the FAQ: "It will provide universal interconnect with Serial ATA, while offering logical SCSI compatibility along with the reliability, performance and manageability of Parallel SCSI. " "It will be based on a serial interface, allowing for increased device support and bandwidth scalability, reducing the overhead impact that challenges today's SCSI environments. It will provide easy solutions for systems with simplified cable routing. It will also utilize the Serial ATA development work on smaller cable connectors, providing customers a downstream compatibility with desktop class ATA technologies." "Serial Attached SCSI will have support for at least 128 addresses, and provide single ported device support. " "Serial Attached SCSI complements Serial ATA by adding device addressing, and offers higher reliability and data availability services, along with logical SCSI compatibility. It will continue to enhance these metrics as the specification evolves, including increased device support and better cabling distances. Serial ATA is targeted at cost-sensitive non-mission-critical server and storage environments. Most importantly, these are complementary technologies based on a universal interconnect, where Serial Attached SCSI customers can choose to deploy cost-effective Serial ATA in a Serial Attached SCSI environment. " "Can I use Serial Attached SCSI hard drives in my Serial ATA workstation or desktop PC? No, this is not a supported configuration. Serial Attached SCSI cannot be deployed in a desktop or workstation Serial ATA environment. However, Serial Attached SCSI customers do have the option of using lower cost Serial ATA devices in a native Serial Attached SCSI environment (upwards compatibility is supported). " So if my understanding is correct I can throw slow but giant SATA drives on my RAID SASCSI card, along with with my faster (but super expensive) SASCSI drives. However john doe cannot throw a SASCSI cheetah on his onboard SATA controller. Damn SASCSI sure is a mouthful though. I guess we will see more details in the future.
  11. twistedemotions

    SATA-II details (Native Command Queuing), SCSI future stuff

    BTW... current SATA is 150MB/sec and SATA-II is 300MB/sec. Why you would need 300 when it is 1 dedicated channel/connector per drive? Regardless nice to see things will keep improving with ATA... However what directions is SCSI going? I know a few people wish that the SCSI/ATA barrier would just disappear... but I have my doubts (Essentially some have said SCSI will killed by the time SATA-III comes out). Ultra320 is just coming to market, and I heard some rumors about Ultra640. Anyone have some articles/details on SCSI or what technology may replace it?
  12. "SEAGATE, INTEL AND SILICON IMAGE UNVEIL NEW SERIAL ATA II CAPABILITIES Native Command Queuing Brings New Intelligence to Entry-level Servers, Networked Storage and High-end PCs SAN JOSE, Calif. — 09 September 2002 — Seagate, Intel and Silicon Image today at the Intel Developer Forum demonstrated new Serial ATA II interface capabilities that are defined by the upcoming Serial ATA II specification. Among other advances, the working system showcased today implements Native Command Queuing - a key new capability defined in the Serial ATA II specification that will enable new intelligence in entry-level servers, networked storage devices and high-end PCs. Today's demonstration shows an integrated Serial ATA solution including a hard drive, host controller, and system software - all required to perform command queuing - and is the first example of new features expected to be outlined in the Serial ATA II specification scheduled to be released next quarter. The demonstration represents an important step toward enabling a future of data-intensive and rich content delivered via PCs, Consumer Electronics devices, home network hubs and ubiquitous small servers. While the Serial ATA 1.0 specification already ensures performance headroom for years to come, the Serial ATA II specification enhances Serial ATA with features that add data-handling intelligence to provide additional value for entry-level server, networked storage and high-end PC markets. These features are expected to further increase the momentum of Serial ATA in these targeted applications and to help accelerate the industry transition from Parallel ATA to Serial ATA. Native Command Queuing is perhaps the most anticipated feature of the new specification. It enables a hard drive to take multiple requests for data from the processor and rearrange the order of those requests to maximize throughput. Serial ATA II hard drives will be able to queue and execute requests without any assistance from a system's CPU or motherboard chipset. Today's demo highlights the benefits of the Serial ATA Native Command Queuing that has been prototyped by the three Companies involved. The system uses Silicon Image's SATALink SiI 3112A PCI to Serial ATA host controller, a custom prototype drive provided by Seagate and software developed by Intel. In a head-to-head comparison, the Seagate Serial ATA native queuing drive and an equivalent Parallel ATA drive are both exercised with a disc-intensive workload. The IOPS (I/Os per second) performed by each drive is displayed real-time on side-by-side "tachometers." While today's demonstration focuses on Native Command Queuing, the companies are also moving forward to develop new Serial ATA II features including: * Performance improvements such as out-of-order execution/delivery and data scatter/gathering * Complete enclosure management including fan control, activity indicators, temperature control, new device notification * Backplane interconnect solution to extend trace lengths beyond those allowed by Serial ATA 1.0 for use in racks of hot-swappable drives * Efficient connectivity to a large number of drives "Seagate's work to develop new technologies like Serial ATA gives our customers greater opportunities to create new products in the PC and entry-server markets, with new features and new levels of performance," said Darci Arnold, Seagate vice president, Global Marketing. "Our R&D leadership and our work with technology leaders like Intel and Silicon Image continues to enable advances for our customers." Parviz Khodi, Silicon Image vice president of marketing, stated, "Our collaboration with Seagate and Intel made this important demonstration possible. Only integrated Serial ATA drive and host solutions have the features necessary to perform native command queuing, which is critical to Serial ATA II functionality. We designed the SiI 3112 host controller with enhanced capabilities beyond the requirements of the Serial ATA 1.0 specification, enabling the implementation and demonstration of next-generation Serial ATA II command queuing capability today. As the first and only production-ready, fully integrated Serial ATA host controller, our SATALink SiI 3112 is a key enabler in the industry's transition to Serial ATA and a testament to our leadership in implementing Serial ATA technology." Serial ATA is an evolutionary replacement of the Parallel ATA physical storage interface in the desktop as well as the cost-sensitive server and network storage market segments. It uses thinner, more flexible cables and lower pin counts, allowing computer makers to design systems with cables that are simpler to route and install, improving thermal designs and facilitating smaller form factor systems. It enables easier, more flexible motherboard routing and the use of smaller connectors than is possible with the existing Parallel ATA technology. The technology, enhanced by the benefits of the Serial ATA II spec, is expected to provide a storage interface that meets the needs of computers for the foreseeable future. Beginning next quarter, Serial ATA will be deployed in numerous products to connect such internal storage devices as hard disks, DVDs and CD-R/Ws to the motherboard in desktop and mobile PCs, cost-sensitive servers and networked storage. Serial ATA II products may become available as early as next year, and will be fully compatible with Serial ATA 1.0 products and maintain software compatibility with today's operating systems. Seagate is the world's leading provider of storage technology for Internet, business and consumer applications. The Company's products include disc drives for the Enterprise, PCs and Consumer Electronics, as well as Storage Area Network (SAN) solutions. Seagate's market leadership is based on delivering award-winning products, customer support and reliability to meet the world's growing demand for information storage. Seagate can be found around the globe and at Headquartered in Sunnyvale, Calif., Silicon Image, Inc. designs, develops and markets multi-gigabit semiconductor and system solutions for a variety of communications applications demanding high-bandwidth capability. With its proprietary Multi-layer Serial Link (MSL) architecture, Silicon Image is well positioned for leadership in multiple mass markets including PCs, consumer electronics, storage and networking. Currently, Silicon Image leads the global PC/display arena with its innovative digital interconnect technology, and is now emerging as a leading player in the storage industry-offering robust, high-bandwidth semiconductors and systems. For more information on Silicon Image, visit This news release contains forward-looking information within the meaning of federal securities regulations. These forward-looking statements include statements related to inclusion of Silicon Image products in other companies' products, the timing and possible continuation of these relationships, and the performance expected of such products. These forward-looking statements involve risks and uncertainties, including those described from time to time in Silicon Image's filings with the Securities and Exchange Commission (SEC), that could cause the actual results to differ materially from those anticipated by these forward-looking statements. In particular, customers may integrate competitors' products rather than Silicon Image's products, the volumes may not materialize, and the inclusion may not produce revenue, margin or profit during the period expected or at all. Also see "Management's Discussion and Analysis of Financial Condition and Results of Operations-Factors Affecting Future Results" in the most recent Annual Report, Form 10-K or 10-Q filed by Silicon Image with the SEC. Silicon Image assumes no obligation to update this forward-looking information. " Snagged from
  13. You don't. The file must be on a webserver somewhere... note that many free hosts block off-site image links and have considerable bandwidth limitations. PowerEdge Expandable RAID Controller, Channel, 128MB Cache, SCSI U3, Raid 0/1/5/10/50" Retail Price from Dell $2,049.00 megaraid enterprise 1600 128mb 4ch u160 64/66 $1,157.00 retail Price wise can we say ouch. Hope you got these second-hand or in some special deal. This a server? I would assume, but you mention "rig" like its your gaming pc. What kind of level of RAID are you running? Oh and why use a quad channel board for 4 drives?
  14. Gigabit Ethernet: 1000^3 bits/sec = 1,000,000,000 bits/sec 1,000,000,000 bits/sec / 8 = 125,000,000 bytes/sec 125,000,000 bytes/sec / 1024 = 122070.3125 Kilobytes/sec 122070.3125 Kilobytes/sec / 1024 = 119.20928955078125 Megabytes/sec Fast Ethernet: 100,000,000 bits/sec / 8 = 12,500,000 bytes/sec 12,500,000 bytes/sec / 1024 = 12207.03125 Kilobytes/sec = 11.920928955078125 Megabytes/sec Other factors: Do watch for duplex on/off and collisions. Keep in mind these are the theoretical numbers and will not include overhead. Performance will vary according to NIC drivers, manufacturer, cable length, cable quality, cable material, and hardware setup. OS, switches, and hubs will play a part also! Bus bandwidth: 32-bit/33 Mhz PCI ---> 127.2 MB/sec 64-bit/33 Mhz PCI ---> 254.3 MB/sec 64-bit/66 Mhz PCI ---> 508.6 MB/sec 64-bit/133 MHz PCI-X ---> 1017.3 MB/sec Other factors: Integrated ATA on the southbridge will use Northbridge/Southbridge interconnect (which in the past was PCI). Keep in mind these are the theoretical numbers and will not include overhead. Performance will vary by manufacturer, bios, and hardware setup. IDE Interface bandwidth: Ultra ATA/33 ---> 33 MB/sec Ultra ATA/66 ---> 66 MB/sec Ultra ATA/100 ---> 100 MB/sec Ultra ATA/133 ---> 133 MB/sec Other factors: Keep in mind these are the theoretical numbers and will not include overhead. Performance will vary by cable length & quality, controller manufacturer, drivers, and OS. SCSI Interface bandwidth: Wide ---> 10 MB/sec Fast ---> 10 MB/sec Fast Wide ---> 20 MB/sec Ultra ---> 20 MB/sec Wide Ultra ---> 40 MB/sec Ultra2 ---> 40 MB/sec Wide Ultra2 ---> 80 MB/sec Ultra160 ---> 160 MB/sec Ultra320 ---> 320 MB/sec Other factors: Keep in mind these are the theoretical numbers and will not include overhead. Performance will vary by cable length & quality, controller manufacturer, drivers, and OS. Single disk sequential transfer rates (STR): SCSI Seagate X-15K.3 --> 76.4MB/s - 51.1MB/s SCSI Seagate X-15 - 36 LP --> 60.5 MB/sec - 45 MB/sec SCSI Seagate X-15 --> 41 MB/sec - 29 MB/sec SCSI IBM Ultrastar 36LZX --> 34.8 MB/sec - 22.8 MB/sec IDE IBM 60GXP --> 39 MB/sec - 21 MB/sec IDE Western Digitial Caviar WD1000JB --> 43.8 MB/s - 27.9 MB/sec Other factors: Sustained transfer rates are most relevant for reflecting the drive's performance when dealing with largish files. There is a big difference between a 10 MB file that is laid out contiguously on the disk, and one that is fragmented into a dozen pieces. Once you fragment the file, you aren't doing a consecutive data transfer any more. Each fragment of the file introduces the need for an additional positioning step to the location where the next piece starts, which slows the transfer and introduces other factors into the performance measurement. Finally, real-world transfers incur all sorts of penalties due to operating system overhead and other considerations. A good rule of thumb in the computer world is that you never get the theoretical maximum of anything.
  15. The folks in this forum are pretty damn knowledgabe.... So I thought I'd ask for some opinions/recommendations. Here is the setup: ---------------- 2U rackmount case Tyan Tiger MPX 2 x AMD Athlon MP 2200+ ZIPPY 460W 2U ATX Power Supply with PFC ( Power Factor Correction ) 4 GB of ECC registered PC2100 Pioneer DVD-106S ATAPI 16x/40x DVD-ROM Floppy drive 1x AGP/2 x 64/66 PCI riser Nvidia Geforce 2 MX200 AGP Intel Pro 1000 XT NIC 4 drive SCA backplane with terminator Info: Internal network server, AD domain controller (LAN DNS), DHCP, profile storage, general server duties, Hooked up to Gigabit ethernet switch and clients with gigabit ethernet cards. ------------------------ I need to pick a 64bit/66mhz PCI compatible SCSI RAID card and 4 SCA drives. I am willing to wait several months so the upcoming drives and Ultra320 cards can be considered. In regards to the card, I would prefer to only use one channel, but may consider two. The reason for this is due to the major pain in the arse of getting 2 cables through the rackmount case without impeding airflow. With decent folding, a custom length cable, and what-not I can get one cable through with zero impact... Price should be under 1K. The case can accept full length cards, but it can't be too strangely sized. In drives i'm looking for a balanced level of price speed and performance. Sure it would be nice to have 4 Seagate 15k3's but looking at the MSRP thats $4,000 (!!!). Price/Performance/Size balance is a big issue here.... I'd prefer to keep around $500 a drive, anything lower is a blessing. In regars to size it will be carrying the network installs of various software (Office XP) (i'm working on an 1 TB ATA storage monster with MS SUS that will take over). I'll be going with the common RAID 5 unless someone can convince me otherwise. So what are your thoughts?