01-01-2007, 05:20 PM
Be it SATA (1.5G) or SATA II (3.0G) - the highest data transfer rates from a single drive are still in the 75-85 Meg per second range.
The OWC card is only 1.5G - but - today's drives really don't take advantage of what the 3G allows and as a result, doesn't really matter in terms of the card except in much higher end deployments.
Each SATA channel is it's own - so, unlike ATA where two drives on the bus Master/Slave share the bandwidth for transfer - each SATA drive has it's own pipeline.
If you had two modern ATA drives and upgraded from an ATA/66 card to an ATA/133 card - you'd definitely get a significant improvement with both drives active transferring data since two of today's drives can saturate a 66Meg/s bus and even will a 133Meg/sec bus too.
But not so with SATA since the drive doesn't have to share... until single drives are transferring more than 150 meg/sec, not going to be a whole lot of benefit to 3G SATA II which really just added some additional command set features (that happened to cause some of those fun compatibility issues in the G5 and with some of the earlier Mac SATA Controllers till disable was offered on drives...).
Anyway -
we've seen over 100 Megs/second SUSTAINED via our SATA card with 2 drives striped in an accelerated PowerMac G4 100MHz bus.
The OWC card is only 1.5G - but - today's drives really don't take advantage of what the 3G allows and as a result, doesn't really matter in terms of the card except in much higher end deployments.
Each SATA channel is it's own - so, unlike ATA where two drives on the bus Master/Slave share the bandwidth for transfer - each SATA drive has it's own pipeline.
If you had two modern ATA drives and upgraded from an ATA/66 card to an ATA/133 card - you'd definitely get a significant improvement with both drives active transferring data since two of today's drives can saturate a 66Meg/s bus and even will a 133Meg/sec bus too.
But not so with SATA since the drive doesn't have to share... until single drives are transferring more than 150 meg/sec, not going to be a whole lot of benefit to 3G SATA II which really just added some additional command set features (that happened to cause some of those fun compatibility issues in the G5 and with some of the earlier Mac SATA Controllers till disable was offered on drives...).
Anyway -
we've seen over 100 Megs/second SUSTAINED via our SATA card with 2 drives striped in an accelerated PowerMac G4 100MHz bus.