IDPA: DP4400-diskfeil forårsaker ustabilitet i Data Domain-filsystemet

Følgende symptomer kan sees:

• Data Domain Filesystem kan rapporteres som utilgjengelig eller starte på nytt gjentatte ganger
• Logger og varsler i Data Domain kan rapportere "vol1 er utilgjengelig"
• Vedlikeholdstjenestene til Avamar mislykkes på grunn av MSG_ERR_DDR_ERROR
• Uventet høy kapasitet brukt på grunn av gjentatt svikt i Avamar-vedlikehold eller Data Domain-rengjøring
• iDRAC kan vise at alle disker er i orden, men kontrollerlogger kan vise noe annet

eksempler:
Datadomenet kan logge varsler som: 

ALERT Filesystem EVT-FILESYS-00002: Problem is preventing filesystem from running.
EVT-STORAGE-00020: The Active tier is unavailable.
EVT-FILESYS-00011: DDFS process died; restarting

I loggfilen /ddr/var/log/debug/ddfs.info, kan du se feil som:

Jun 30 11:48:28 idpa-dd ddfs[8504]: ERROR: MSG-SL-00004: Volume vol1 is unavailable. err:Missing storage device.
Jun 30 11:58:20 idpa-dd ddfs[15962]: ERROR: MSG-SL-00004: Volume vol1 is unavailable. err:Missing storage device.

Loggfilen /ddr/var/log/debug/kern.info Kan rapportere diskgruppefeil som:

Jun 30  18:51:08 idpa-dd kernel: [10002271.298276] (E4)DD_RAID: Array [dg2/ppart14] encountered READ I/O errors [57.57 dm-10p5 6000c290ea0836a3178bab0785368300] [dev idx: 0] [stripe: 516562] [gs:ffff880ce56ed210, request:ffff880ce9ebeb40] faults:1
Jun 30  18:51:08 idpa-dd kernel: [10002271.298302] (E4)ERROR: dd_dgrp.c:5731 dd_dgrp_array_internal_notification:: Too many disks failed [1, 14, 0]
Jun 30  18:51:08 idpa-dd kernel: [10002271.298305] (E4)DD_RAID: DiskGroup [dg2] has total failure!

Eller ytterligere feil som:

idpa-dd kernel: [56127713.299919] (E4)sd 2:0:1:0: [sds] tag#0 Sense Key : Medium Error [current]
idpa-dd kernel: [56127713.299921] (E4)sd 2:0:1:0: [sds] tag#0 Add. Sense: No additional sense information
idpa-dd kernel: [56127713.299924] (E4)sd 2:0:1:0: [sds] tag#0 CDB: Read(16) 88 00 00 00 00 01 ed 7c 57 42 00 00 02 01 00 00
idpa-dd kernel: [56127713.299926] (E4)dd_blk_update_request: I/O error, dev sds, sector 8279316290
idpa-dd kernel: [56127713.299949] (E4)DEBUG: dd_array_error.c:512 dd_array_handle_fault:: nr_faults:1 array->level_info.nr_disks:1
idpa-dd kernel: [56127713.299956] (E4)DD_RAID: Array [dg2/ppart8] encountered READ I/O errors  [57.57 dm-18p5 6000c2963d6777f9dc56d52993b4f044] [dev idx: 0] [stripe: 806949] [gs:ffff880c10e92220, request:ffff880ce4ec4ca8] faults:1
idpa-dd kernel: [56128442.963940] (E4)DD_RAID: DiskGroup [dg2] has total failure!
idpa-dd kernel: [56128442.963964] (E4)DD_RAID: Array [dg2/ext3]: Suspended
idpa-dd kernel: [56128442.963988] (E4)DD_RAID: Array [dg2/ext3_1]: Suspended

I IDPA DP4400 bruker den virtuelle Data Domain-maskinen datalagre som består av volumer og diskstasjoner i apparatet. Hvis noen diskstasjoner fra VD02 eller VD03 logger feil med høy hastighet, kan datalagerytelsen reduseres nok til at DDOS merker volumet som utilgjengelig og prøver å starte filsystemet på nytt. 

P-hysikaldisk til volumtilordning for DP4400 er som følger:

1. Innhent loggene fra RAID-kontrolleren (PERC) ved hjelp av ett av følgende alternativer:

• • Få tilgang til DP4400 iDRAC, og se tilstanden til lagringsundersystemet
    • Vise komponentstatus for volumene og hver fysiske disk
    • Vis hendelsesloggene og Lifecycle Controller-loggene for tegn på gjentatte diskmeldinger.
    • Utfør en TSR-samling, og sørg for å velge lagringslogger.  Data Domain: Slik samler du inn TSR-logger på PowerProtect DD3300, DD6900, DD9400, DD9900 og DP4400                
  • Få tilgang til ACM ved hjelp av SSH og kjør følgende kommandoer:

Vis status for hver disk: 

• • • Idpa-acm# showfru disk

      Innhent PERC-loggene fra ACM på følgende måte:

    • Idpa-acm# dpacli -host 192.168.100.101 -logs Perc -output perc_logs.tgz

  • Få tilgang til ESXi-verten ved hjelp av CLI, og kjør følgende:

    • Idpa-esx# perccli /c0 show termlog > /tmp/ttylog.txt

    • Idpa-esx# perccli /c0 show events > /tmp/events.txt

2. Fra disse loggene kan du se etter hendelser som vist i eksemplene nedenfor:

06/17/23 5:02:22: C0:EVT#97309-06/17/23 5:02:22: 113=Unexpected sense: PD 03(e0x20/s3) Path 50000399c882671a, CDB: 88 00 00 00 00 00 7e b4 72 29 00 00 01 d7 00 00, Sense: 3/11/01 06/17/23 5:02:22: C0:Raw Sense for PD 3: 72 03 11 01 00 00 00 34 00 0a 80 00 00 00 00 00 7e b4 72 29 02 06 00 00 80 00 3f 00 80 1e 00 88 81 07 02 0f 01 13 00 00 7f cd 01 38 00 02 00 22 1a 40 00 14 c0 c0 0f 00 7f d2 ff ff 06/17/23 5:02:22: C0:DM_PerformSenseDataRecovery:Medium Error DevId[3] devHandle d RDM=40d47600 retries=0 callback=c0358e30 06/17/23 5:02:22: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=427, ld=1, src=7, cmd=2, lba=2f83aac00, cnt=400, rmwOp=0

06/21/23 5:30:01: C0:EVT#97500-06/21/23 5:30:01: 110=Corrected medium error during recovery on PD 03(e0x20/s3) at d05a2e0a 06/21/23 5:30:01: C0:Issuing write verify pd=03 physArm=1 span=0 startBlk=d05a2e13 numBlks=1 06/21/23 5:30:01: C0:EVT#97501-06/21/23 5:30:01: 110=Corrected medium error during recovery on PD 03(e0x20/s3) at d05a2e13 06/21/23 5:30:01: C0:Issuing write verify pd=03 physArm=1 span=0 startBlk=d05a2e14 numBlks=1


seqNum: 0x00002999
Time: Mon Mar 20 17:53:50 2023

Code: 0x0000005d
Class: 0
Locale: 0x02
Event Description: Patrol Read corrected medium error on PD 0a(e0x20/s10) at 8912fa1c
Event Data:
===========
Device ID: 10
Enclosure Index: 32
Slot Number: 10
LBA: 2299722268


seqNum: 0x0000299a
Time: Mon Mar 20 17:53:50 2023

Code: 0x00000071
Class: 0
Locale: 0x02
Event Description: Unexpected sense: PD 0a(e0x20/s10) Path 50000399e8429da2, CDB: 8f 00 00 00 00 00 89 12 fa 1d 00 00 10 00 00 00, Sense: 3/11/01
Event Data:
===========
Device ID: 10
Enclosure Index: 32
Slot Number: 10
CDB Length: 16
CDB Data:
008f 0000 0000 0000 0000 0000 0089 0012 00fa 001d 0000 0000 0010 0000 0000 0000 Sense Length: 60
Sense Data:
0072 0003 0011 0001 0000 0000 0000 0034 0000 000a 0080 0000 0000 0000 0000 0000 0089 0012 00fa 001d 0002 0006 0000 0000 0080 0000 0000 0000 0080 001e 0000 008f 0081 0007 0002 000a 0000 00d6 0000 0000 008d 003e 0000 00ef 0000 0002 0000 0022 001f 0040 0000 0000 00fd 00fd 000a 0000 008d 003e 00ff 00ff 0000 0000 0000 0000

Se etter mønstre og gjentakende feil. Du kan se mange hendelser som logges fra en enkelt stasjon. Dette indikerer hvilken enhet som forårsaker problemer:

$ grep -i "medium error" ttylog.txt
05/08/23 17:30:18: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:18: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
05/08/23 17:30:21: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:21: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
05/08/23 17:30:24: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:24: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
05/08/23 17:30:26: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:26: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
05/08/23 17:30:28: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:28: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
05/08/23 17:30:31: C0:DM_PerformSenseDataRecovery:Medium Error DevId[b] devHandle 15 RDM=40da6800 retries=0 callback=c0358e2c
05/08/23 17:30:31: C0:DM_PerformSenseDataRecovery: Medium Error is for: cmdId=ae, ld=2, src=1, cmd=1, lba=26ca06f8b, cnt=200, rmwOp=0
.
.
$ grep -i "medium error" ttylog.txt | wc -l
2168


$ grep -i "command timeout" ttylog.txt
05/16/23  5:36:54: C0:EVT#06386-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 7b 82 d6 49 00 00 00 68 00 00
05/16/23  5:36:54: C0:EVT#06387-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 02 e9 7e 90 f2 00 00 00 3f 00 00
05/16/23  5:36:54: C0:EVT#06388-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 02 e9 7e 8e 7e 00 00 00 6d 00 00
05/16/23  5:36:54: C0:EVT#06389-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 7b 82 d9 5e 00 00 00 61 00 00
05/16/23  5:36:54: C0:EVT#06390-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 7b 82 d9 33 00 00 00 2b 00 00
05/16/23  5:36:54: C0:EVT#06391-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 7b 82 e6 c3 00 00 00 70 00 00
05/16/23  5:36:54: C0:EVT#06392-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 7b 82 e5 55 00 00 00 60 00 00
05/16/23  5:36:54: C0:EVT#06393-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 02 e9 7e 8e f0 00 00 00 7f 00 00
05/16/23  5:36:54: C0:EVT#06394-05/16/23  5:36:54: 267=Command timeout on PD 0b(e0x20/s11) Path 5000039aa853e82e, CDB: 88 00 00 00 00 03 81 91 08 00 00 00 00 4e 00 00
.
.
$ grep -i "command timeout" ttylog.txt |wc -l
58

I eksemplene ovenfor kan du se at disken i spor 11 (devID b) logger middels feil og tidsavbruddsfeil med høy hastighet.

Følgende eksempler viser problemer med en diskstasjon, for eksempel disktilbakestillinger, loggført av kontrolleren.

Dette eksempelet viser et problem forårsaket av en stasjon som stadig tilbakestilles og forårsaker et problem på den berørte virtuelle disken:

2022-01-21 01:58:39 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset. 
2022-01-21 01:58:39 LOG007 The previous log entry was repeated 27 times. 
2022-01-21 01:56:05 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset. 
2022-01-21 01:56:05 LOG007 The previous log entry was repeated 988 times.
.
.
2022-01-21 04:00:36 545196 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset.
2022-01-21 03:58:39 545193 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset.
2022-01-21 03:56:05 545190 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset.
.
.
2022-01-25 19:21:49 545547 PDR3 Disk 12 in Backplane 1 of Integrated RAID Controller 1 is not functioning correctly.
2022-01-25 19:21:49 545548 VDR56 Redundancy of Virtual Disk 1 on Integrated RAID Controller 1 has been degraded.
2022-01-25 19:21:49 545549 PDR87 Disk 12 in Backplane 1 of Integrated RAID Controller 1 was reset.

En stasjon som er merket som prediktiv mislyktes, kan også forårsake problemer:

2022-09-05 23:01:56 11008 PDR87 Disk 1 in Backplane 1 of RAID Controller in Slot 8 was reset.
2022-09-05 22:55:28 11003 PDR87 Disk 1 in Backplane 1 of RAID Controller in Slot 8 was reset
2022-09-05 23:02:23 11010 PDR87 Disk 1 in Backplane 1 of RAID Controller in Slot 8 was reset.
2022-09-05 23:01:56 11009 PDR16 Predictive failure reported for Disk 1 in Backplane 1 of RAID Controller in Slot 8.
2022-09-05 23:03:28 11012 PDR54 A disk media error on Disk 1 in Backplane 1 of RAID Controller in Slot 8 was corrected during recovery.
2022-09-05 23:02:28 11011 PDR16 Predictive failure reported for Disk 1 in Backplane 1 of RAID Controller in Slot 8.
2022-09-06 10:22:26 11034 PDR54 A disk media error on Disk 1 in Backplane 1 of RAID Controller in Slot 8 was corrected during recovery.
2022-09-06 00:11:27 11029 PDR54 A disk media error on Disk 1 in Backplane 1 of RAID Controller in Slot 8 was corrected during recovery.
2022-09-05 23:18:32 11015 PDR54 A disk media error on Disk 1 in Backplane 1 of RAID Controller in Slot 8 was corrected during recovery.
2022-09-05 23:06:26 11014 PDR16 Predictive failure reported for Disk 1 in Backplane 1 of RAID Controller in Slot 8.

3. Se og identifiser diskdetaljer for verktøyet ved hjelp av en av følgende metoder:

• Bruk iDRAC- eller TSR-data for å vise diskdetaljer
• Fra ACM OS bruker du følgende kommando til å vise diskdetaljer: showfru-disk

4. Kontakt Dell Support for å opprette en serviceforespørsel, og se denne artikkelen for bekreftelse av diskbytte.

  Dette gjøres fra Data Domain CLI ved å kjøre kommandoen: 

filesys disable