On Thu, Sep 16, 2004 at 10:50:05PM -0400, harry wrote: > > Tim and Neil have suggested (apparently correctly) that the disk had a bad > sector and the firmware remapped it when I wrote to it. My question is, > how many spare sectors does the typical disk have? More importantly, since > the sector has been remapped, recreating the raid5 array worked fine, but > is a failure right out of the box normal? I was going to return it but > since its working now I'm not sure if I should or not. Can you read SMART Attributes under any OS? Every disk I use, have a SMART Reallocated_Sector_Ct Attribute: ------ # smartctl -A /dev/hde smartctl version 5.32 Copyright (C) 2002-4 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF READ SMART DATA SECTION === SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 065 063 006 Pre-fail Always 147852401 3 Spin_Up_Time 0x0003 100 100 000 Pre-fail Always 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always 0 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always 0 (...) ------ You should search for your hard-drive datasheet, but RAW_VALUE is probably a counter of remapped sectors. If RAW_VALUE is high, if VALUE is low and going near THRESH, it means you're going to have troubles with this disk. You can read http://www.linuxjournal.com/article.php?sid=6983 -- Seb, autocuiseur - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
