Sander, can you apply the attached patch and redo the test. Regards, Nagalakshmi -----Original Message----- From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-owner@xxxxxxxxxxxxxxx] On Behalf Of Sander Smeenk Sent: Wednesday, January 18, 2012 3:37 PM To: linux-scsi@xxxxxxxxxxxxxxx Subject: scsi_scan.c reports 'target allocation failed, error -6' w/ mptsas Hi, i'm experiencing issues while hot(re)plugging SAS-drives in a server running 2.6.32-37 (stock Ubuntu Lucid). The disks are connected to an LSI Logic / Symbios Logic SAS1064 PCI-X Fusion-MPT SAS HBA (1000:0500 r2) Google has no information at all on this specific errormessage. Situation: The server is running on 4xSAS drives with the mptsas module, disks are JBODed to the OS, the OS has them in mdadm software raid. Each disk needs to be replaced so i unconfigure one in mdadm, ask the kernel to 'delete' the device node: | # echo 1 > /sys/block/sdN/device/delete And then i pull the disk after which the kernel logs: | scsi: killing requests for dead queue | scsi target4:0:1: mptsas: ioc0: delete device: fw_channel 0, fw_id 1, | phy 1, sas_addr 0x500000e019670902 When i reseat the replacement disk, nothing gets logged. When i then ask the kernel to rescan the scsi bus on host4, the kernel logs an error: | # echo '- - -' > /sys/class/scsi_host/host4/scan | scsi target4:0:4: target allocation failed, error -6 The replacement drive will not be available to the OS until the system is rebooted after which the drive works like a charm. The error message is produced in drivers/scsi/scsi_scan.c but i believe the target_alloc() call comes from the drivers/scsi/mtpsas/mptsas.c driver. Unfortunately my kernelhack-fu is lacking to look into this further. As stated, Google has no information about this either. Anyone on this list with clues as to why this happens or how to circumvent it from happening with the other three disks? Thanks, With regards, -Sander. -- | How do you write zero in Roman numerals? | 4096R/20CC6CD2 - 6D40 1A20 B9AA 87D4 84C7 FBD6 F3A9 9442 20CC 6CD2 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
Attachment:
scsi-misc-2[1].6.git-3e84beba608dee5a7c7711a3503eb2f335c78fca.patch
Description: scsi-misc-2[1].6.git-3e84beba608dee5a7c7711a3503eb2f335c78fca.patch
