Messages in this thread | | | Date | Mon, 16 May 2005 13:29:56 +0200 | From | Matthias Andree <> | Subject | Re: Linux does not care for data integrity (was: Disk write cache) |
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On Mon, 16 May 2005, Arjan van de Ven wrote:
> I think you missed the part where disabling the writecache decreases the > mtbf of your disk by like a factor 100 or so. At which point your > dataloss opportunity INCREASES by doing this.
Nah, if that were a factor of 100, then it should have been in the OEM manuals, no?
Besides that, although my small sample is not representative, I have older drives still alive & kicking - an MTBF of 1/100 of what the vendor stated would mean the chance of failure way above 90 % by now, the drive has seen 22,000 POH with write cache off and has been a system drive for like 14,000 POH. So?
> Sure you can waive rethorics around, but the fact is that linux is > improving; there now is write barrier support for ext3 (and I assume > reiserfs) for at least IDE and iirc selected scsi too.
See the problem: "I assume", "IIRC selected...". There is no list of corroborated facts which systems work and which don't. I have made several attempts in compiling one, posting public calls for data here, no response.
I don't blame you personally, but the lack of documentation about such crucial facts or generally documentation in Linux environments in general.
-- Matthias Andree - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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