From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Oskar Liljeblad" Subject: clock drift with two Promise Ultra133 TX2 (PDC 20269) cards Date: Mon, 2 May 2005 21:28:43 +0200 Message-ID: <20050502192843.GA3367@oskar> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from diadema.skane.tbv.se ([193.13.139.13]:14236 "EHLO diadema.skane.tbv.se") by vger.kernel.org with ESMTP id S261724AbVEBT2p (ORCPT ); Mon, 2 May 2005 15:28:45 -0400 Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Cc: linux-kernel@vger.kernel.org I'm running 2.6.11.8 on an server with two Promise Ultra133 TX2 (PDC20269) PCI cards, same hardware revision (judging from stickers on the cards). I'm using the CONFIG_BLK_DEV_PDC202XX_NEW driver. Each card has two connected hard drives. Whenever I read from a disk on one of the cards (e.g. using 'dd if=/dev/hdX of=/dev/null bs=1M'), and at the same time read from a disk on the other card, there is heavy software clock drift. It drifts about 2-5 seconds per minute. This does not happen if I read from two drives connected on the same card, or if I read from a drive connected to the motherboard IDE (VIA vt8233a) and a drive on either of the Promise cards. Oskar Liljeblad (oskar@osk.mine.nu)