--On Tuesday, January 27, 2004 23:03:56 +0100 [EMAIL PROTECTED] wrote:
On Tue, 27 Jan 2004, Larry Rosenman wrote:What kind of warranty?
So do I... I have 6 disks... 250$ each...Date: Tue, 27 Jan 2004 16:02:40 -0600 From: Larry Rosenman <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Cc: pgsql-hackers list <[EMAIL PROTECTED]> Subject: Re: Write cache
--On Tuesday, January 27, 2004 23:01:45 +0100 [EMAIL PROTECTED] wrote:
> On Tue, 27 Jan 2004, Larry Rosenman wrote: > >> Date: Tue, 27 Jan 2004 15:55:49 -0600 >> From: Larry Rosenman <[EMAIL PROTECTED]> >> To: [EMAIL PROTECTED] >> Cc: pgsql-hackers list <[EMAIL PROTECTED]> >> Subject: Re: Write cache >> >> >> >> --On Tuesday, January 27, 2004 22:48:42 +0100 [EMAIL PROTECTED] wrote: >> >> > On Tue, 27 Jan 2004, Larry Rosenman wrote: >> > >> >> Date: Tue, 27 Jan 2004 15:45:20 -0600 >> >> From: Larry Rosenman <[EMAIL PROTECTED]> >> >> To: [EMAIL PROTECTED] >> >> Cc: pgsql-hackers list <[EMAIL PROTECTED]> >> >> Subject: Re: Write cache >> >> >> >> >> >> >> >> --On Tuesday, January 27, 2004 22:43:34 +0100 [EMAIL PROTECTED] wrote: >> >> >> >> > On Tue, 27 Jan 2004, Larry Rosenman wrote: >> >> > >> >> >> Date: Tue, 27 Jan 2004 15:38:30 -0600 >> >> >> From: Larry Rosenman <[EMAIL PROTECTED]> >> >> >> To: [EMAIL PROTECTED], pgsql-hackers list >> >> >> <[EMAIL PROTECTED]> Subject: Re: Write cache >> >> >> >> >> >> IDE or SCSI? >> >> > SCSI >> >> >> >> >> >> Why do you think the WC is screwing you? >> >> >> >> >> > Because after a sys crash, the most used filesystems (databases) >> >> > are screwed >> >> what VxFS mount options are you using? >> > Nothing special... And any option I could use would'nt change a >> > thing: the cache is on the disk itself... I did'nt look physicaly >> > yet but according to the docs there's no way to disable it lik I >> > always did on IBM... >> > >> > I was forced to buy those disk (more expensive, not better) >> define not special? >> >> ISTM that the driver should force it out to the disk, unless the disk >> is lying to the driver, or the driver is buggy. > That's exactly what I think: the DISK has a write cache so it's lying > to the controler saying data is written when it's only in the disk > cache. > > That also would explain the fantastic write performance I have > compared to read... SO, I consider these disks buggy or not acceptable for use.
How Old?
LER
>> >> >> > > >> >> >> >> >> Which driver(s)? >> >> >> >> >> > Guess... ADPU320 >> >> Hrm. >> >> >> >> >> LER >> >> >> >> >> >> >> >> >> --On Tuesday, January 27, 2004 22:34:46 +0100 [EMAIL PROTECTED] >> >> >> wrote: >> >> >> >> >> >> > Because I've lost a lot of data using postgresql (and I know >> >> >> > for sure this should'nt happen) I've gone a bit further >> >> >> > reading documentations on my disks and... >> >> >> > >> >> >> > I have FUJITSU MAP3367NC 36G 10000 rpm disks, those disk have >> >> >> > a write cache of 8Mb, if someone could tell me hox to turn it >> >> >> > off... Could'nt find it in the docs and this could very well >> >> >> > explain why a busy database crashes every time >> >> >> > >> >> >> > Thanks for your help >> >> >> > >> >> >> > -- >> >> >> > Olivier PRENANT Tel: +33-5-61-50-97-00 (Work) >> >> >> > 6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax) >> >> >> > 31190 AUTERIVE +33-6-07-63-80-64 (GSM) >> >> >> > FRANCE Email: [EMAIL PROTECTED] >> >> >> > ------------------------------------------------------------- >> >> >> > --- --- --- --- ----- Make your life a dream, make your dream >> >> >> > a reality. (St Exupery) >> >> >> >> >> >> >> >> >> >> >> >> >> >> > >> >> > -- >> >> > Olivier PRENANT Tel: +33-5-61-50-97-00 (Work) >> >> > 6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax) >> >> > 31190 AUTERIVE +33-6-07-63-80-64 (GSM) >> >> > FRANCE Email: [EMAIL PROTECTED] >> >> > ---------------------------------------------------------------- >> >> > --- --- --- ----- Make your life a dream, make your dream a >> >> > reality. (St Exupery) >> >> >> >> >> >> >> >> >> > >> > -- >> > Olivier PRENANT Tel: +33-5-61-50-97-00 (Work) >> > 6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax) >> > 31190 AUTERIVE +33-6-07-63-80-64 (GSM) >> > FRANCE Email: [EMAIL PROTECTED] >> > ------------------------------------------------------------------- >> > --- --- ----- Make your life a dream, make your dream a reality. (St >> > Exupery) >> >> >> >> > > -- > Olivier PRENANT Tel: +33-5-61-50-97-00 (Work) > 6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax) > 31190 AUTERIVE +33-6-07-63-80-64 (GSM) > FRANCE Email: [EMAIL PROTECTED] > ---------------------------------------------------------------------- > --- ----- Make your life a dream, make your dream a reality. (St > Exupery)
-- Olivier PRENANT Tel: +33-5-61-50-97-00 (Work) 6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax) 31190 AUTERIVE +33-6-07-63-80-64 (GSM) FRANCE Email: [EMAIL PROTECTED] ------------------------------------------------------------------------- ----- Make your life a dream, make your dream a reality. (St Exupery)
-- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 972-414-9812 E-Mail: [EMAIL PROTECTED] US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749
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