# Segfault

**URL:** <https://forums.percona.com/t/segfault/2259>\
**Category:** Percona XtraBackup\
**Created:** [June 14, 2012, 12:22am UTC](https://forums.percona.com/t/segfault/2259 "2012-06-14T00:22:40Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ilan](https://avatars.discourse-cdn.com/v4/letter/i/ecae2f/32.png) [@ilan](https://forums.percona.com/u/ilan)\
**Post date:** [June 14, 2012, 12:22am UTC](https://forums.percona.com/t/segfault/2259/1 "2012-06-14T00:22:40Z")

</div>

I’ve got many messages in my kernel.log:

segfault at 20 ip 00000000004c0f72 sp 00007fe43d859db0 error 4 in xtrabackup\_55[400000+3a4000]

This happened after dmesg showed

Jun 13 03:31:00 vps-fastvps kernel: [6532903.959267] ata2.00: status: { DRDY ERR }Jun 13 03:31:00 vps-fastvps kernel: [6532903.959284] ata2.00: error: { UNC }Jun 13 03:31:00 vps-fastvps kernel: [6532903.978598] ata2.00: configured for UDMA/133Jun 13 03:31:00 vps-fastvps kernel: [6532903.978615] ata2: EH completeJun 13 03:31:02 vps-fastvps kernel: [6532906.839830] ata2.00: exception Emask 0x0 SAct 0x6 SErr 0x0 action 0x0Jun 13 03:31:02 vps-fastvps kernel: [6532906.839871] ata2.00: irq\_stat 0x40000008Jun 13 03:31:02 vps-fastvps kernel: [6532906.839892] ata2.00: failed command: READ FPDMA QUEUEDJun 13 03:31:02 vps-fastvps kernel: [6532906.839917] ata2.00: cmd 60/e0:10:00:f8:67/03:00:04:00:00/40 tag 2 ncq 507904 inJun 13 03:31:02 vps-fastvps kernel: [6532906.839918] res 41/40:e0:e0:f8:67/00:03:04:00:00/00 Emask 0x409 (media error) Jun 13 03:31:02 vps-fastvps kernel: [6532906.839992] ata2.00: status: { DRDY ERR }Jun 13 03:31:02 vps-fastvps kernel: [6532906.840012] ata2.00: error: { UNC }Jun 13 03:31:03 vps-fastvps kernel: [6532906.920182] ata2.00: configured for UDMA/133Jun 13 03:31:03 vps-fastvps kernel: [6532906.920205] ata2: EH completeJun 13 03:31:05 vps-fastvps kernel: [6532909.773199] ata2.00: exception Emask 0x0 SAct 0x3 SErr 0x0 action 0x0Jun 13 03:31:05 vps-fastvps kernel: [6532909.773240] ata2.00: irq\_stat 0x40000008Jun 13 03:31:05 vps-fastvps kernel: [6532909.773261] ata2.00: failed command: READ FPDMA QUEUEDJun 13 03:31:05 vps-fastvps kernel: [6532909.773285] ata2.00: cmd 60/e0:00:00:f8:67/03:00:04:00:00/40 tag 0 ncq 507904 inJun 13 03:31:05 vps-fastvps kernel: [6532909.773286] res 41/40:e0:e0:f8:67/00:03:04:00:00/00 Emask 0x409 (media error) Jun 13 03:31:05 vps-fastvps kernel: [6532909.773360] ata2.00: status: { DRDY ERR }Jun 13 03:31:05 vps-fastvps kernel: [6532909.773380] ata2.00: error: { UNC }Jun 13 03:31:05 vps-fastvps kernel: [6532909.845796] ata2.00: configured for UDMA/133Jun 13 03:31:05 vps-fastvps kernel: [6532909.845813] ata2: EH completeJun 13 03:31:08 vps-fastvps kernel: [6532912.764865] ata2.00: exception Emask 0x0 SAct 0x2 SErr 0x0 action 0x0Jun 13 03:31:08 vps-fastvps kernel: [6532912.764904] ata2.00: irq\_stat 0x40000008Jun 13 03:31:08 vps-fastvps kernel: [6532912.764925] ata2.00: failed command: READ FPDMA QUEUEDJun 13 03:31:08 vps-fastvps kernel: [6532912.764950] ata2.00: cmd 60/e0:08:00:f8:67/03:00:04:00:00/40 tag 1 ncq 507904 inJun 13 03:31:08 vps-fastvps kernel: [6532912.764951] res 41/40:e0:e0:f8:67/00:03:04:00:00/00 Emask 0x409 (media error) Jun 13 03:31:08 vps-fastvps kernel: [6532912.765025] ata2.00: status: { DRDY ERR }Jun 13 03:31:08 vps-fastvps kernel: [6532912.765045] ata2.00: error: { UNC }Jun 13 03:31:08 vps-fastvps kernel: [6532912.837382] ata2.00: configured for UDMA/133Jun 13 03:31:08 vps-fastvps kernel: [6532912.837396] ata2: EH completeJun 13 03:31:11 vps-fastvps kernel: [6532915.714838] ata2.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0Jun 13 03:31:11 vps-fastvps kernel: [6532915.714878] ata2.00: irq\_stat 0x40000008Jun 13 03:31:11 vps-fastvps kernel: [6532915.714895] ata2.00: failed command: READ FPDMA QUEUEDJun 13 03:31:11 vps-fastvps kernel: [6532915.714916] ata2.00: cmd 60/e0:00:00:f8:67/03:00:04:00:00/40 tag 0 ncq 507904 inJun 13 03:31:11 vps-fastvps kernel: [6532915.714917] res 41/40:e0:e0:f8:67/00:03:04:00:00/00 Emask 0x409 (media error) Jun 13 03:31:11 vps-fastvps kernel: [6532915.714980] ata2.00: status: { DRDY ERR }Jun 13 03:31:11 vps-fastvps kernel: [6532915.714997] ata2.00: error: { UNC }Jun 13 03:31:11 vps-fastvps kernel: [6532915.795743] ata2.00: configured for UDMA/133Jun 13 03:31:11 vps-fastvps kernel: [6532915.795758] ata2: EH complete

I believe segfault is caused by a hardware problem, but anyway maybe this message would be usefull.

Thanks.