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IBM AIX-AK FZK 2005 manual

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Table of contents for the manual

  • Page 1

    IBM Syste ms Group AIX-AK FZK 2005 © 200 5 IBM C orporation Apri l 2005 AIX AK A pril 2 005 Forsch ungsze ntrum Karlsruh e[...]

  • Page 2

    IBM Syste ms Group AIX-AK FZK 2005 © 200 5 IBM C orporation IBM Storage with Linu x 2005 Alexande r Warm uth ATS EME A Storage[...]

  • Page 3

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Topic s  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 4

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation What Is Supported  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 5

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation IBM Storag e S upp ort for Lin ux DS4000 Storage Servers Enterprise Storage Server Linear Tape Open Enterprise Tape Ne twork Att ached Sto rage Sto rage Virtualizatio n[...]

  • Page 6

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation pLin ux Support D isk  ESS: SLES8, SLES9, RH -EL 3  SDD av ailable  JS20, p 5 and OP: SL ES9, RH-EL 3  Remo te boot suppo rted  DS6000, DS8000: SLES8, SLES9, RH-EL 3  SDD av ailable  JS20: S LES8 , SLES9 , RH-E L 3  p5 an d OP: RH-EL 3 only  Remo te boot suppo [...]

  • Page 7

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation pLin ux Support Tape  LTO: SLES 8, SLES 9, RH-EL 3  Data P ath (f or 3584) a nd Med ia Chan ger failover su ppor ted  359x: SLES 8, SLES 9, RH-EL 3  Data p ath failo ver su pport ed for 35 92  Parallel SCSI attachment also supported  Advanced  IBMtap e devi ce driver[...]

  • Page 8

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation The Lin ux SCS I Subsys tem  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 9

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Linux D ev ice Addres sin g brw-rw ---- 1 root d isk 8, 0 2003-0 3-14 14:07 /dev/ sda brw-rw ---- 1 root d isk 8, 1 2003-0 3-14 14:07 /dev/ sda1 brw-rw ---- 1 root d isk 3, 0 2003-0 3-14 14:07 /dev/ hda crw-rw ---- 1 root d isk 9, 0 2003-0 3-14 14:07 /dev/ st0 crw-rw ---- 1 root d isk 9,[...]

  • Page 10

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Desi gn SD disks block device (sd_mod.o) User Space Kernel Space SG pass-through char device (sg.o) ST tapes char device (st.o) SR cdrom/dvd block device (sr_mod.o) SCSI unifying layer (scsi_mod.o, scsi*.[hc], hosts.[hc], constants.c) SCSI / FC Host Bus Adapter drivers (e.g. qla2300.o) P[...]

  • Page 11

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Linux Kern el Vers ion 2.6  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 12

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Storag e Ch anges in Lin ux Kern el 2 .6  Increased number of SCSI devices  Persistent device names  Improved hotplugging  Native multipathing  LVM 2  Improved I/O performance  Larger devices and filesystems[...]

  • Page 13

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Wellkn own Linu x SCSI Lim itation s  Limited number of devices  Up to 256 SCS I dis k device s  Up to 256 SCS I gene ric de vices  Up to 32 tape drive s  Gaps in LUN sequence  Limited “on-the-fly” attachment  Device re-ordering Fixed w ith Kernel 2.6 Still there[...]

  • Page 14

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Other P robl ems an d Pitfa lls  Multiple LUN support of RH-EL  DS4000 Specific  QLog ic failo ver dri ver con figura tion  Pote ntial LU N thrash ing  UTM (Ac cess L UN)  ESS, DS6000, DS8000 Specific  SDD an d LVM , ext3  Mount ing PP RC targ ets  DS600 0 Pref[...]

  • Page 15

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Large fi lesyste ms support  Linux Kernel Limits  Max fil e size: 2 TB (2 ^41 bytes)  Max fil e system size: 8 ZB (2^73 bytes)[...]

  • Page 16

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Multipath in g Sc enarios  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 17

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Multipath in g Con cepts Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 DS6000 DS8000[...]

  • Page 18

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation LUN Transfer to A lternate Controlle r  DS4000 transfers LUNs to alternate controll er  Volu mes are owned by on e contro ller  Volu mes can be acc essed th rough both contro llers  Volu me own ership is al ways tran sferred t o the contro ller that is us ed for v olume acc e[...]

  • Page 19

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation LUN Thrashin g Sc enario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 20

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation LUN Thrashin g Sc enario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 21

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation LUN Thrashin g Sc enario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 22

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Multipath in g with RD AC  Must use QLogic non-failover driver  Always uses current path (as reporte d by DS4000)  RDAC installation  FC HB A driver must be inst alled an d lo aded  At le ast one L UN mu st be assigned and availab le  Must use Host Type LNXCLS - AV T tu[...]

  • Page 23

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation RDA C Shared D ata S cenario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 24

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation RDA C Shared D ata S cenario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 25

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation RDA C Shared D ata S cenario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 DS4000 A B[...]

  • Page 26

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Preferr ed Path  DS6000 uses concept of preferred path  Volu mes are owned by on e contro ller  Volu mes can be acc essed th rough both contro llers  Data is transfe rred to and from ow ning co ntrolle r to re questin g contro ller int ernall y -> pe rformanc e pen alty ?[...]

  • Page 27

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Preferr ed Path Sh ared D ata Sce nario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 DS6000[...]

  • Page 28

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Preferr ed Path Sh ared D ata Sce nario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 DS6000[...]

  • Page 29

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Preferr ed Path Sh ared D ata Sce nario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 A B DS6000[...]

  • Page 30

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Preferr ed Path Sh ared D ata Sce nario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 2 DS6000[...]

  • Page 31

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Host P orts I ndepe nden t of C ontrolle r  ESS and DS8000 have indepe ndent host ports  Volu mes are owned by on e contro ller  All h ost port s can commu nicate w ith b oth con trollers  Dynam ic load balan cing a cross all port s possi ble[...]

  • Page 32

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Indepen den t Host Por t Shared D ata Sc en ario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 DS8000[...]

  • Page 33

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Indepen den t Host Por t Shared D ata Sc en ario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 1 2 DS8000[...]

  • Page 34

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Indepen den t Host Por t Shared D ata Sc en ario Linux host 1 HBA 0 Disk LUN 0 HBA 1 Linux host 2 HBA 0 HBA 1 2 DS8000[...]

  • Page 35

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Tape S pec ifics  What is supported  The Linux SCSI subsystem  Linux Kernel version 2.6  Multipathing scenarios  Tape specifics[...]

  • Page 36

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation IBMtape drive r  For download as binary rpm p ackage  Kernel module IBMtape.o  Require d to u tiliz e all LTO capa bilies  Manag es medi um ch anger failove r  Prov ides new device s and ioctl  Daemon IBMtaped NDMC-7:/ # ls -l /dev/IBM* crw-rw-rw- 1 root root 253, 128 S[...]

  • Page 37

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation ------- ------ ------- ----- - General Comman ds: -- ------ ------ ------- -------- 1. Open a Device 7. Reques t Sens e 2. Close a Devic e 8. Log Se nse Pa ge 3. Inquir y 9. Mode S ense P age 4. Test U nit Rea dy 10. Switch Tape/ Changer Devic e 5. Reserv e Devic e 11. Create Speci al Fi[...]

  • Page 38

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Use LTO Dev ices  Native  tools: mt, mt x, IBMt apeutil  appl ications: cpio, tar, tap er, afi o  3 rd party applications  All maj or bac kup s olutions availab le f or Linux  Attent ion: s ome are only t ested wi th paral lel SC SI atta chment  Check ISV Ma rtrix fo[...]

  • Page 39

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Native Lib rary Manag emen t  Linux tool for media change rs: mtx  Media changer is addressed throug h SCSI generic device mtx -f /de v/sg1 inquir y mtx -f /de v/sg2 status mtx -f /de v/sg2 load < slot num> [ <driv enum > ] /dev /s g0 - internal SCSI di s k, not relevan[...]

  • Page 40

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Medium Chan ger Failover  Automatitcally moves robot contro l to another drive in case of a failure  Available for 2582, 3583, 3584  Enabled as an option for I BMtape driver  Check the /proc/scsi/IBMchanger file Linux host HBA SCSI / FC tape SCSI / FC tape Robot[...]

  • Page 41

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Tape a nd D isk Con nec ted to th e S ame HBA Linux host HBA 0 Disk LUN 0 HBA 1 Disk LUN 1 HBA 2 SCSI / FC tape SCSI / FC tape Robot Linux host HBA 0 Disk LUN 0 HBA 1 Disk LUN 1 SCSI / FC tape SCSI / FC tape Robot  Possible, but not recommen ded  Use separate switch zone, too  O[...]

  • Page 42

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Questio ns & Disc ussion More Qu estion s? What a re your custome rs needs? Contact : warm uth@de .ibm.com[...]

  • Page 43

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation ESS / DS6000 / D S8000 Resourc es  Enterprise Storage Server intero perability matrix  Subsystem Device Driver (SDD)  Fibre channel host bu s adapter firmware and driver level  Additional supported co nfigurations  ESS host systems attachment gu ide http://w ww.storag e.ib[...]

  • Page 44

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation DS400 0 Resourc es  DS4000 Storage interoperabil ity matrix  Fibre channel host bu s adapter firmware and driver level  Additional supported co nfigurations http://w ww.ibm .com/serve rs/sto rage/dis k/ds4000 /interop-m atrix.h tml  DS4000 Technical Support  DS4000 Downloa[...]

  • Page 45

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation LTO Resourc es  LTO Compatibility Informati on  LTO ISV Matrix http://w ww.storag e.ibm.co m/tape /lto/compatib ility.h tml  LTO Downloads http://w ww.ibm .com/serve rs/sto rage/suppo rt/lto/lto downlo ads.htm l ftp://ftp.so ftware.ib m.com/ storage /devdrvr/Li nux/[...]

  • Page 46

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation  Implementing Linux with IBM Disk Storage http://w ww.redbo oks.ibm .com/red books/ pdfs/sg246 261 .pdf  Linux with xSeries and FAS tT: Essentials http://w ww.redbo oks.ibm .com/red books/ pdfs/sg247 026 .pdf  Implementing IBM LTO in Linux and Windows http://w ww.redbo oks.ibm .[...]

  • Page 47

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation White P ape rs  FAStT and Linux HowTo http://w ww.ibm .com/dev eloperwo rks/es erver/art icles/ins tall_fibre/ index.h tml  FAStT and RH AS Cluster http://w ww.ibm .com/serve rs/esd d/articles /redhat /index.htm l  ESS Attachment to United Linu x 1 (IA-32) http://w ww.ibm .com/s[...]

  • Page 48

    IBM Sy stems Gro up AIX-AK FZK 2005 © 200 5 IBM C orporation Legal N otic es Both Linu x and Storage are rapidly changing environments. This information is presente d "as is" withou t any warra nty of any kind. Cu stomers are r esponsible for d etermining the suitability t o their respective environments . Only a repr esentative subs et [...]