Comment 24 for bug 494476

Hi,

the kernel update from last week has made our troubles worse.
I have not managed to get one backup without the 120s blocking since the update.
Althout I didn't change anything else. Still using noop as io-scheduler.

I'll open a new bug report when no one is responding here.
Sorry but this is most important to us.

I don't think there is anything special with our hardware or setup:

- dual Quad-Core AMD Opteron(tm) Processor 2378 (8 cores)
- 32GB Ram
- SAS: 08:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
           09:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
- SCSI: 02:08.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev c1)

- each SAS serves 24 SATAs HDDs: WDC WD3000HLFS-01G6U1 (Raptor)
- SCSI servers HP tape library with two LTO-3 Ultrium 3-SCSI drives

best regards
Lars