SCSI vs IDE

Oct 19, 2004 4 Replies

The ability for SCSI to be hot-swappable is functionality of a RAID controller. Most levels of RAID can endure the failure of a disk and not be compromised. Try looking at some RAID controller docs....

The purpose of having a disk hot-swappable is to allow the system to continue running as if there was a disk there to compensate for the bad disk. If you have only one disk drive, that can't be achieved.

Mike

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cabability.Can

Hi all, I've all read the descriptions of these 2 bus specifications. Nowhere have I seen electrical specification particularly regarding hot swap cabability.Can anyone drop me pointers regarding: a) Electrical signals in SCSI that makes hot-swap(level 4) a possibility. b) What can be done (externally) to make ATA/IDE hot swappable (level 4)



Thanx, Joji


I think serial-ATA has better support for hot-swapping compared with parallel-ATA.

Thanks, Jack

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cabability.Can

I

cabability.Can

I've used the Rocket Raid 133 product for hot swapping IDE drives...

Here is a quote from the Highpoint-tech product literature:

Data Security For RAID 1 and 0+1, the RocketRAID 133 provides disk mirroring, hot-spare options for automatic array-rebuilds, hot-swap support for swapping failed disks on the fly (works with Hot-Swap capable mobile racks such as Rocket Mate), and disk failure notification (audible alarms, visual warning messages). These features provide a high level of security and data protection against hard disk failure.

Here is their url:

formatting link

It is easier if the drive is behind a RAID controller: SCSI:

formatting link
IDE:
formatting link

Kevin

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