>What throughput speeds can I expect with an internal hd? what specs >will get me >the fastest throughput, IDE/Firewire, etc... or am i maxed out by >the system bus?
The folks at <http://www.MacGurus.com> have a dozen "the SCSI pages of Doom" and one or two "IDE Pages of Dread" that have all this covered in easy-to-read articles somewhat biased in favor of upgrading older 32-bit PCI bus macs. To max out even a 32-bit PCI bus you'll need 160MB/sec, achievable only with multiple drives striped in a RAID, such as four RAID0 Ultra160 LVD drives or a pair of RAID0 Ultra320 LVD drives. x500 and x600 PCI Macintosh 05MB/sec for SCSI-1 (e.g. "external" bus) 10MB/sec for SCSI-2 narrow (e.g. "internal" bus) PCI Add-in SCSI cards in a 32-bit PCI slot (x500 and x600 PowerMacs) 20MB/sec for SCSI-2 Wide (e.g. Adaptec 2930U) 40MB/sec for "UltraSCSI Initiative" Ultra160 LVD (e.g. Initio Miles2, ATTO ExpressPCI) [My 9500/Miles2 delivers 24MB/sec with two RAID0 7200 RPM drives, common real-world performance among other owners I've chatted up.] PCI Add-in SCSI cards in a 64-bit PCI slot (B&W G3 and later) 80MB/sec for SCSI-3 Ultra320 LVD (e.g. ATTO ExpressPCI Ultra 3) PCI Add-in IDE cards in a 32-bit PCI slot (x500 and x600 PowerMacs) 25MB/sec for ATA66 (e.g. VST UltraTek66 card, Sonnet Tempo ATA66) PCI add-in PCI FireWire card 50MB/sec, so it copes with with anything short of ATA133 or Ultra320 drives. -- [EMAIL PROTECTED] -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | SPECIAL LIST PRICES - Apple PCI Video Cards from $19.99, MacOS 8.5 CD $79.99 Replacement Parts IN STOCK, Apple CDROMs from $19.99 <mailto:[EMAIL PROTECTED]> Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
