Is ATA 133 backwards compatible with ATA 100?
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Is ATA 133 backwards compatible with ATA 100
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ATA 133 is not yet an industry standard. (owned by Maxtor)
However, it was designed to be full backward compatible.
The higher transfer rate of 133 MB/sec is achieved by shortening the cycle time from 40 ns (ATA 100) to 30 ns (ATA 133).
A couple good reads
http://www.maxtor.com/products/fastdrive/whitepaper.htm
Raid/133
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There are some fairly large architectural changes in the ATA-133 format. The major ones I can see is the 48-bit address bus and and the 137GB limit on the other ATA formats. If you have one of Maxtors new 160GB HDD's, how is a ATA-100 controller giong to see it all if it's address bus limits it to 137GB? Me thinks I may have to do some reading on this!
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Originally posted by brashquido
Partitioning won't do it because the 137GB limit is the physical limit of what the controller on pre ATA-133 can address. You can only partition a drive if the controller can address it!
no matter how large your physical disk or array.
But a ATA133 controller is backwards comp. with all previous ATA drives
If you really need 160Gb of storage now
a}buy a pair of 80's (priced about the same, could be used in a raid, greater reliablity( aleast one should work))
b}upgrade motherboard or buy a PCI ATA133 controller card, along with the drive.
If your just looking towards future needs, STOP! serial-ATA is coming, prices on ATA133 drive will continue to drop.
Buy about what you need for 3 years.
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Originally posted by T-Shirt
Brash is correct, an ATA-100 will not ba able to see more than 137Gb
no matter how large your physical disk or array.
But a ATA133 controller is backwards comp. with all previous ATA drives
If you really need 160Gb of storage now
a}buy a pair of 80's (priced about the same, could be used in a raid, greater reliablity( aleast one should work))
b}upgrade motherboard or buy a PCI ATA133 controller card, along with the drive.
If your just looking towards future needs, STOP! serial-ATA is coming, prices on ATA133 drive will continue to drop.
Buy about what you need for 3 years.
I'm actually looking to setup a 480GB volume using an IDE Hardware RAID 5 controller card and 4 X Maxtor 160GB HDD's. Currently there seems to only be ATA-100 RAID 5 cards, so I might just hang back for a bit until the whole ATA-133, ATA-100 compatability thing becomes a bit clearer.
What are the advantages of serial ATA, and when is it expected to hit the market?
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Originally posted by LunchBoxIs ATA 133 backwards compatible with ATA 100?
Maxtor say the address bus issue with ATA-133 being a 48-bit address bus, and ATA-100 having a 28-bit address bus will be overcome (with Windows 2000 anyway) with Service Pack 3.
For people looking for an ATA-133 RAID 5 card, the response I received from Promise said they are planning to release one, but didn't specify a release date.
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