feipoa wrote:While the suspected winner is obvious, it would be nice to have some numbers. For completeness throw in PIO-4, ATA-33, and a fe […]
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While the suspected winner is obvious, it would be nice to have some numbers. For completeness throw in PIO-4, ATA-33, and a few other SCSIs, then chart the results.
The presumed winning order on a fast 486 might be,
1. Ultra2-LVD SCSI (80 MB/s)
2. Ultra Wide SCSI (40 MB/s)
3. Ultra SCSI (20 MB/s)
4. SATA-150
5. Fast SCSI (10 MB/s)
6. ATA-33
7. PIO-4
Experimental results always speak louder than hearsay. It would be interesting to see where SATA-150 and ATA-33 met up with SCSI on the 486 bandwidth chart. I guess we have no ambitous takers?
Parallel ATA (PATA)
IDE / PIO 0, 3MB/s
ATA-1 = ATA, IDE , PIO 2, 8MB/s
ATA-2 = EIDE aka Fast or Ultra ATA / Fast IDE, PIO 4/DMA 2, 16MB/s
ATA-3 Was dropped
ATA-4 = Ultra ATA/33 aka UDMA/33 , Ultra DMA 2, 33MB/s
ATA 5 = Ultra ATA/66 aka UDMA/66 , Ultra DMA 4 / 80-wire, 66MB/s
ATA 6 = Ultra ATA/100 aka UDMA/100 , Ultra DMA 5 / 80-wire, 100MB/s
ATA 7 = Ultra ATA/133 aka UDMA/133 , Ultra DMA 7 / 80-wire, 133MB/s
Small Computer System Interface (SCSI)
SCSI-1 = SCSI-1, aka Narrow SCSI, 5MB/s
Fast SCSI = SCSI-2, 10MB/s
Fast-Wide SCSI = SCSI-2 / SCSI-3 SPI, 20MB/s
Ultra SCSI = SCSI-3 SPI, aka Fast-20, 20MB/s
Ultra Wide SCSI = SCSI-3 SPI, 40MB/s
Ultra 2 SCSI = SCSI-3 SPI-2, aka Fast-40, 40MB/s
Ultra 2 Wide SCSI = SCSI-3 SPI-2, 80MB/s
Ultra 3 SCSI = SCSI-3 SPI-3, aka Ultra-160, Fast-80 wide, 160MB/s
Ultra 320 SCSI = SCSI-3 SPI-4, aka Ultra-4; Fast-160, 320MB/s
Ultra 640 SCSI = SCSI-3 SPI-5, aka Ultra-5, 640MB/s
Serial Advanced Technology Attachment (SATA)
SATA, 150MB/s
SATA, 300MB/s
SATA, 500MB/s
Solid State Drives (SSD)
There are min diff form factor host interface: Serial ATA, PCI Express, PCI, Fibre Channel, USB, Parallel ATA (IDE/EIDE), SCSI (Parallel/Serial).
SSD, Slow as 1MB/s to well over 1500MB/s
Keep in mind that memory cards like CompactFlash (CF), Secure Digital (SD), Memory Stick, and xD-Picture Card were all originally designed for digital cameras but later found their way into other device like USB, Phones and so on which typical there interface is generally 4/30x times slower than what is available on SSDs interface.
Slow as 1MB/s up to 200MB/s with USB3 interface
The Problem with old IDE that where used since the days 80286 all way to some of the first model Pentium is there controller didn't support ATA-2 mode if I recall rigth and even add-on device so there for Narrow SCSI or Fast SCSI and Wide was about 2x faster then IDE even on ISA bus which you limed to 4.7MHz and VLB was petty much on it way out door even know it pettey fast 33/40 to 50HMz on thsos old 486 board, 2nd problem is 486 bios didn't always see some PCI IDE add-on card if your lucky and have a 486 with PCI slot.
IDE and Serial ATA 300MB/s never did catch to SCSI, How ever PCIe Solid State Drives blow door off SCSI Interface.