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- Newsgroups: comp.unix.questions
- Path: sparky!uunet!caen!sol.ctr.columbia.edu!eff!ckd
- From: ckd@eff.org (Christopher Davis)
- Subject: Re: Read/Write and caching, for TEMPEST
- In-Reply-To: alan@nabeth.enet.dec.com's message of 23 Jul 92 18:21:24 GMT
- Message-ID: <CKD.92Jul24130202@loiosh.eff.org>
- Sender: usenet@eff.org (NNTP News Poster)
- Nntp-Posting-Host: loiosh.eff.org
- Organization: Electronic Frontier Foundation Tech Central
- References: <RHL.92Jul17094825@valhalla.mitre> <1992Jul23.182124.28084@nntpd2.cxo.dec.com>
- Date: Fri, 24 Jul 1992 17:04:24 GMT
- Lines: 18
-
- Alan> == Alan Rollow <alan@nabeth.enet.dec.com>
- RHL> == rhl@valhalla.mitre.org writes:
-
- RHL> 1) Is there a way to force it to physically read the disk
- RHL> every time without caching?
-
- Alan> Yes. Unmount the file system between reads. Since that will
- Alan> be extraordinarly inconvient, you might just try reading the
- Alan> disk directly, rather than going through the file system.
-
- Even that makes no guarantees with the current generation of caching
- SCSI controllers; the disk may very well have a one-track or more cache
- that you're just pumping data into and getting it back from...
- --
- Christopher Davis * ckd@eff.org * System Administrator, EFF * +1 617 864 0665
- ``The First Amendment is often inconvenient. But that is besides the
- point. Inconvenience does not absolve the government of its obligation
- to tolerate speech.'' --Justice Anthony Kennedy, in 91-155
-