[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: cvs corruption during tag operation

From: Larry Jones
Subject: Re: cvs corruption during tag operation
Date: Fri, 10 Feb 2006 19:47:28 -0500 (EST)

Jeremy Todd writes:
> I didn't think file corruption like this (a single bit in a file flipping,
> without any warning) could occur with modern hardware. I knew that RAID, ECC
> RAM, etc can help, but I thought that regardless of hardware, the worst case
> was detected corruption not undetected corruption.

On the contrary, modern hardware has become reliable enough, and the
market price sensitive enough, that manufacturers had eliminated almost
all error detection in the name of reducing cost.  Many motherboards no
long support parity memory of any kind.  Those that do tend to have full
ECC detection and correction, although many of them only detect ECC
failures during the power-on self test, not during normal operation. 
Although SCSI has always supported parity checking, the IDE disk
interface prior to ATA/100 had no error detection whatsoever.  And
modern software is so unreliable that no one notices the hardware

-Larry Jones

Hello, local Navy recruitment office?  Yes, this is an emergency... -- Calvin

reply via email to

[Prev in Thread] Current Thread [Next in Thread]