Hitachi to Release Half TB Drive Soon 607
samdu writes "Hitachi has announced plans to release a 7200 RPM 3.5 inch 500 GB hard drive in the first quarter of this year." Maybe this one won't require a new motherboard to use. I think I've replaced more mobo's to handle larger drives than I have to support faster CPUs.
Sounds like an OS problem ... (Score:4, Informative)
Seriously, as long as you get the kernel in the part of the disk that your motherboard supports, (or don't boot off that disk at all), Linux will work with it, no matter what motherboard you've got. No 128GB limit to worry about, even if you don't have ATA/100 (or is it ATA/133 that is supposedly required to support 128GB+ drives?)
I've even read those 200+ GB disks on a Pentium 120 Dell's onboard controllers on Linux. No problem -- Linux knew to ignore the BIOS settings on the drive and just made it work.
Re:3.0Gb/s - 817 Mb/s? (Score:5, Informative)
While it's nice to something as fast as possible, is there a point to have a 3.0Gb/s interface to a product that can only handle 817Mb/s?
On drive cache.
Re:3.0Gb/s - 817 Mb/s? (Score:4, Informative)
Yes.
Re:3.0Gb/s - 817 Mb/s? (Score:1, Informative)
Re:3.0Gb/s - 817 Mb/s? (Score:2, Informative)
Not to taco (Score:1, Informative)
Why don't you try running linux, which will ignore the BIOS and do it's own HDD geometry homework.
I know you need Windows because linux is hard for non-technical users, but all the drive makers have their own soft-bios utilities to support the larger drives on old hardware.
They have had these since the 2 gigabyte barrier.
There's also add-on controllers if you really need a new interface feature, like the next only-exists-on-paper UDMA speed.
Thread on SR (Score:4, Informative)
Re:Why not faster? (Score:5, Informative)
Re:Sounds like an OS problem ... (Score:3, Informative)
Re:Why not faster? (Score:2, Informative)
I don't know exactly what the mechanical problems are, but 10,000 RPM is pretty friggin fast. I remember years ago hearing that 4,800 was the absolute fastest speed they could go for some reason or another.
Not applicable (Score:4, Informative)
Re:Why not faster? (Score:3, Informative)
Re:Why not faster? (Score:5, Informative)
There's also that RPM is not the only way of making things faster. Basically, the performance of a hard disk is determined by 3 variables:
Rotational latency: The time it takes for the disk to spin into the right position. That is, once the head is on the right place, this is how long it has to wait for the data to pass under it. More RPM translates into less rotational latency.
Seeking latency: The time it takes for the drive's assembly to get into the right position.
These two are often added up in the statistics. Solid state drives pretty much lack them. I'm setting up now a firewall that boots from CompactFlash on CF-IDE adapter, and it boots really fast despite a transfer rate of only 2 MB/s. Latency can add up to quite a lot.
Data rate: The speed at which the drive reads or writes data once everything is in the right place. This is a function of the RPM and data density. More speed means the data passes under the heads faster. More density means there's more data per square inch.
So, increasing RPM is one way of getting more performance. The other one is packing more data into the same place. Some drives have small platters for this reason. This also means that a bigger drive is often also faster than a smaller one, given identical RPM, platter size, and number of platters.
Yes, its called Serial Attached SCSI - (Score:1, Informative)
There is actually a _great_ need to increase the communication speed between drives and controller.
For more information on SAS, see my Wikipedia article at:
http://en.wikipedia.org/wiki/Serial_Attached_SCSI [wikipedia.org]
Since wikipedia is down or slow right now, here is the non-wiki version of the article and a link:
Serial Attached SCSI (also known as SAS) is a new generation of SCSI designed to allow for much higher speed data transfers. SAS does this by serial communication instead of the parallel method found in traditional SCSI devices.
SAS supports up to 16,256 addressable devices per port and point to point data transfer speeds up to 3Gbps, but is expected to reach 10Gbps by the year 2010. The SAS connector is much smaller than traditional parallel SCSI connectors allowing for small 2.5 inch drives.
The physical SAS connector is form factor compatible with SATA, allowing for much cheaper SATA drives to connect to a SAS backpane. SAS drives are not compatible on a SATA bus and have their physical connector keyed to prevent any plugging into a SATA backpane.
Serial Attached SCSI supports three transport protocols:
* Serial SCSI Protocol (SSP) - Supporting SAS disk drives
* Serial ATA Tunneling Protocol (STP) - Supporting SATA disks
* Serial Management Protocol (SMP) - Supporting SAS Expanders
SAS General Overview - http://www.scsita.org/aboutscsi/sas/tutorials/SAS
Mod parrent -1, troll (Score:1, Informative)
What the poster is talking about is 48bit LBA which is required to break the 132gig limit.
Indeed a good way to fix this is to use an addon card, just make sure your operating system knows what to do with 48bit LBA. Windows has some issues last time I checked.
only the 75GXP line (Score:4, Informative)
Re:Well what an interesting article (Score:5, Informative)
400GB for $330ea (Score:2, Informative)
Re:yay! (Score:2, Informative)
Re:Sounds like an OS problem ... (Score:4, Informative)
By old, I mean DOS old -- I don't even think Windows 95 uses the BIOS for disk access once booted up unless it has no other choice. OS/2 had an int 13h driver that it could use if there was no other option -- but you certainly didn't want to use it unless you had to, because the performance sucked.
The problem is that Windows blindly trusts what the BIOS returns for the drive parameters. A smart OS can ignore the BIOS settings if they don't match what the drive itself returns. It can also look at the partition table and use those settings instead of what the BIOS reports, if that makes more sense.
I said OS issue. I meant it. Oh, I've come across it. And I know it's a pain. But I certainly wouldn't replace a motherboard for it -- I'd either 1) update the BIOS (if an update available), 2) add an external IDE card (which has it's own BIOS), or 3) or pick an OS that can handle the BIOS issue better. Another option might be one of those `boot managers' that comes with the large drives as well -- they add a little bit of code that fools Windows into seeing the correct drive parameters instead of what the BIOS returns.But if my P120 box can read a 200 GB disk with it's internal controller, I'm guessing that almost anything can. But the BIOS on that computer can't handle anything over 8 GB properly, so Windows would be out of the question.
Re:Well what an interesting article (Score:3, Informative)
Re:Hitachi, feh (Score:3, Informative)
Re:Sounds like an OS problem ... (Score:3, Informative)
Since the BIOS is not even jumped into by some operating systems, it has NOTHING to do with ANYTHING after booting. Period. The BIOS is NOT some magical layer in between the OS and the hardware, it is just some code. If the OS does not explicitly use it, it has NO EFFECT WHATSOEVER on the function of the machine.
Go back to my hole? Go learn the actual function of the PC BIOS, and how it works, perhaps by studying DOS assembly programming. You obviously do not understand it now. When you use the bios through the x86 INT instruction, it stores an address, uses the vector table to figure out wher e to jump, and jumps to that address. It begins executing code from there until it is told to return, at which point you code picks up where it left off. No INT, no BIOS. Build a bridge and get over the fact that you are wrong.
Unnecessary, if you get a motherboard (Score:1, Informative)
Just make sure you ask the linux kernel guys why they still can't be bothered to document the recent (2.6.7) change in the naming of SATA devices from
find linux-2.6.10/Documentation -type f -exec grep -iw sata '{}' \;