Difference between revisions of "SCSI hard disk replacement options"

From 68kMLA Wiki
Jump to: navigation, search
(Tidy up in progress)
Line 3: Line 3:
  
 
The choice should depend on the use to be expected for the device.  
 
The choice should depend on the use to be expected for the device.  
*For frequent use with heavy writing load, where writing access performance is important, have a [[SCSI-IDE converter]] in combination with a new silent IDE harddisk (available in 2.5" and 3.5" varieties). Keep in mind that in combination with a recent disk drive the data throughput usually is throttled by the host adaptor or the bus speed inside the computer, not the drive. If your system has no fan and you need it to be even quieter than a modern silent harddisk but with top performance, have a solid state disk or an industrial grade dual CF adaptor with two CF cards in striping RAID mode (level 0). Find Information about solid state disks in the article [http://68kmla.net/wiki/Using_flash_memory using flash memory].
+
 
*In any other case a recent CF card in an appropriate adaptor should do well in a vintage machine. (Do not use this drive for virtual memory.) A Micro Drive (with the CF form factor) for use as a replacement for a standard hdd would give you the benefits of a small footprint, low power consumption and fast writing access. It would combine the disadvantages of both CF cards (less reliable) and usual hard disk drives (moving parts), also.  
+
--
*If price matters (as it usually does), you might consider an external SCSI enlosure with a long cable, hiding away the drive in a place where it is allowed to be noisy, and use up used server hard disks (SCSI). You might have to throw in a few extra bucks for a recent SCSI-a-lot-pins to standard SCSI adaptor, but gain a cheap supply for high speed drives. This especially applies to people with access to server farms, where usable drives get swapped for new ones based on a fixed schedule.  
+
 
 +
*For frequent use with heavy writing load, where writing access performance is important, try a [[SCSI-IDE converter]] with a new silent [[IDE]] harddisk (2.5" or 3.5"). Keep in mind that the throughput of a modern drive is usually throttled by the slow host adaptor or bus speed, not the drive itself.  
 +
 
 +
*If you need very low noise, or low heat (as in a fanless Mac), but with top performance, try a Solid State Disk ([[SSD]]) or industrial Compact Flash ([[CF]]) card and adaptor.  Some CF adapters mount two cards, however many of these allegedly will not mount two cards in a Mac.
 +
 
 +
*A striped [[RAID]] can provide even faster performance. Unless you are using a high-performance  [[Upgrades/Drive controllers|drive controller]], it will still be limited to the host Mac's speed
 +
 
 +
*Find Information about solid state disks in the article [http://68kmla.net/wiki/Using_flash_memory using flash memory].
 +
 
 +
*In any other case a recent CF card in an appropriate adaptor should do well in a vintage machine. (Use for [[virtual memory]] is [http://68kmla.net/forums/viewtopic.php?p=64733#64733| debated])  
 +
 
 +
*A [[MicroDrive]] would give you the benefits of a small footprint, low power consumption and fast write speeds. It would combine the disadvantages of both CF cards (less reliable<references/>) and usual hard disk drives (moving parts), also.
 +
 +
*If price matters, consider an external SCSI enclosure filled up with used SCSI server hard disks. With a long cable you can hide the drive in a place where it is allowed to be noisy. You might have to throw in a few extra bucks for a recent SCSI-a-lot-pins to standard SCSI adaptor, but gain a cheap supply for high speed drives. This especially applies to people with access to server farms, where usable drives get swapped for new ones based on a fixed schedule.  
 
*And, a more hypothetical case, if the price should not matter at all, have an UPS buffered RAM-disk and stream the data to a NAS.
 
*And, a more hypothetical case, if the price should not matter at all, have an UPS buffered RAM-disk and stream the data to a NAS.
  

Revision as of 17:37, 22 July 2008

Stop icon color.pngThis article may require cleanup to meet 68kMLA's quality standards.

Most classic macs use a hard disk drive as their main mass storage medium. The majority of 68k Macs uses SCSI hard disk drives of a kind not in production any more. There are several options to replace a defective SCSI hard disk drive. Here you will find some suggestions.

The choice should depend on the use to be expected for the device.

--

  • For frequent use with heavy writing load, where writing access performance is important, try a SCSI-IDE converter with a new silent IDE harddisk (2.5" or 3.5"). Keep in mind that the throughput of a modern drive is usually throttled by the slow host adaptor or bus speed, not the drive itself.
  • If you need very low noise, or low heat (as in a fanless Mac), but with top performance, try a Solid State Disk (SSD) or industrial Compact Flash (CF) card and adaptor. Some CF adapters mount two cards, however many of these allegedly will not mount two cards in a Mac.
  • A striped RAID can provide even faster performance. Unless you are using a high-performance drive controller, it will still be limited to the host Mac's speed
  • In any other case a recent CF card in an appropriate adaptor should do well in a vintage machine. (Use for virtual memory is debated)
  • A MicroDrive would give you the benefits of a small footprint, low power consumption and fast write speeds. It would combine the disadvantages of both CF cards (less reliable) and usual hard disk drives (moving parts), also.
  • If price matters, consider an external SCSI enclosure filled up with used SCSI server hard disks. With a long cable you can hide the drive in a place where it is allowed to be noisy. You might have to throw in a few extra bucks for a recent SCSI-a-lot-pins to standard SCSI adaptor, but gain a cheap supply for high speed drives. This especially applies to people with access to server farms, where usable drives get swapped for new ones based on a fixed schedule.
  • And, a more hypothetical case, if the price should not matter at all, have an UPS buffered RAM-disk and stream the data to a NAS.

Always have a working backup of your important data!

Hints

If you are interested in a solid state storage solution, go to the page about using flash memory.

If want to use a harddisk drive of recent make, go to the page about SCSI-IDE converter.