Hi, Is this a problem with Hard Disk?
ad3: WARNING - READ_DMA48 UDMA ICRC error (retrying request) LBA=441504576 ad3: FAILURE - READ_DMA48 status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=441504576 [diagnostic] cache_lock: blocked on 0xffffffe0796fdcb8 "@@-1:00009" [diagnostic] cache_lock: unblocked @@-1:00009 after 2 secs I am running DragonFly v3.1.0.353.geafcc4-DEVELOPMENT #6: Tue Mar 20 15:33:26 IST 2012 and did # smartctl -l selftest /dev/ad3 smartctl 5.40 2010-10-16 r3189 [DragonFly 3.1-DEVELOPMENT x86_64] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF READ SMART DATA SECTION === SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Completed without error 00% 1024 - # 2 Extended offline Completed without error 00% 8 - Thanks Siju