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lug-bg: RAID problem... very complex


  • Subject: lug-bg: RAID problem... very complex
  • From: teodor@xxxxxxxxxx (Teodor Georgiev)
  • Date: Wed, 28 Feb 2001 19:13:42 +0100



   Zdraveite,   naskoro mi se padna nelekata zadacha da vgradq RAID
tehnologiq na edna mashina. Mashinata e Intelski server

*shasi - SR2050
*Server board - STL2
*CPU - Intel Pentium III 800MHz
*RAID controller - SRCU31 , rezhim - 1 (mirroring)

tyj kato mashinata e intelska, reshihme da vzemem i Intelski RAID -
i2o...
v qdrata ima poddryzhka za i2o... prosto q addvame i si trygva...
i2o RAID-a se razpoznava bez nikakyv problem.

I uzh si raboti dobre... montirame mu dqlovete /dev/i2o/hda# ... pishem
i chetem po tqh... Btw sys Slack 7.1 sme...

no.... koga doide golqmoto razocharovanie... na 2.4.x kernel bqhme...
pochnah da zapsvam edin golqm fail (500MB arhiv)
i zabelqzah, che se dyni qkata.... zapochnah da go tovarq s intenzivni
transferi i razbrah kyde e greshkata...

Sled kato trygneh da triq zapisanite ot men failove po RAID partitiona
mi izlizashe s edna ot slednite dve greshki:

"Freeing blocks not in datazone......"            ili

"Attempt to acces beyond the physical end of device.. ..... "

totalno dynene...  reshih, che problema e v 2.4.x kernela, che e
izpolzwam novite ext2fs (1.1.19) tools... slozhih gi - syshtata
rabota...

ami minah na 2.2.x (16-18) kerneli... tam ne mi q pravi tazi mizeriq...
kopira si stabilno...
ama.... tam pyk pri  boot message-tata mi dava nqkwa druga greshka ot
tipa : "unknown partial transfer error.. ...."

a skorostta e kym 1.5-2MB/s, koeto e smeshno za PCI i2o RAID... sys SCSI
diskove Seagate Cheetah...
qwno ot gornata greshka kopira bavno...

*** da ne zabravq da kazha, che s fdiska ne moga da pravq extended i2o
partitioni...

.. .... ...hubavo... minah na Mylex RAID...

opitah s klasicheskiq DAC960...

nqma greshki... vsichko e tochno, ama... ... .... ....     transfera e
SMESHNO SLAB...   za failove, po-malki ot 100MB si vyrvi byrzichko,
i to dosta byrzo, ama vsichki znaem, che tova e zaradi cache pametta na
RAID kontrolera... A kato spre da razchita na cache-a skorostta
se sviva do 1,2MB/s... opitah da smenq failovata sistema ot ext2fs na
vfat... tam pyk oshte po-bavno :)))))) e ama hora... tova e SCSI + RAID
kontroler...

i tova dobre... opitvam s Accele RAID170 na Mylex...   v kernela mu go
zadavam kato 960... razpoznava si go...

i oshte ot bootinga zapochva na vseki 30 sekundi sredno da mi dava
slednata greshka:

"DAC960#0:    Encolsure 1 Temperature sensor 0 failed

na vseki 30sec mi go izkarva tova neshto... vse edno e greshen red ot
inittaba... deeba... a transfera pak ne e realno byrz...

kysah si gyza ot chetene, hodene po saitove i mail grupi... pomognete
deeba... nqkoi ako ima opit...

 "Yes, I am Cisco, you are Bay, we love to route our ways..."

              ======================
              Teodor  Georgiev
              System Administrator
              Netplus OOD - Sofia
              phone: ++359-2-9633298
              ======================

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