From mboxrd@z Thu Jan 1 00:00:00 1970 From: worley@alum.mit.edu (Dale R. Worley) Subject: Re: [PATCH] st: implement sysfs based tape statistics v2 Date: Sun, 08 Feb 2015 12:07:58 -0500 Message-ID: <87r3u0mivl.fsf@hobgoblin.ariadne.com> References: Return-path: Received: from resqmta-ch2-08v.sys.comcast.net ([69.252.207.40]:32843 "EHLO resqmta-ch2-08v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751365AbbBHRIC (ORCPT ); Sun, 8 Feb 2015 12:08:02 -0500 In-Reply-To: (shane.seymour@hp.com) Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Seymour, Shane M" Cc: linux-scsi@vger.kernel.org One feature of tape statistics is that they're as much about the *tape* as they are about the *drive*, which is uncommon for block devices. It might be useful to have a set of counters which is cleared every time a new tape is inserted into the drive. In particular, "bad reads since this tape was inserted" would be very useful for monitoring the quality of tapes. Dale