Hi,
I seem to found the issue, as soon as there is high load on AXX6DRV3GEXP that is connected to axxrms2ll080 drives gets disconnected.
I first removed the 3tb drives from AXX6DRV3GEXP and added them direct to axxrms2ll080 and everything worked fine, as soon i started to copy information from disk in AXX6DRV3GEXP i notices that other drives that where in AXX6DRV3GEXP ( 2tb disks ) now started to lose connection as soon i was copying data over 70-100mb/sec from disk in AXX6DRV3GEXP. Some times i was lucky to see them connect again and some times i had to restart.
So i moved AXX6DRV3GEXP and connected it to my pci-e lsi 1068e, now everything works with out any disk jumping out.
Here is some info how it lookt when i was copying before i moved it to 1068e:
Nov 13 13:28:07 joker kernel: [169481.317041] sd 2:0:121:0: [sdr] Synchronizing SCSI cache
Nov 13 13:28:07 joker kernel: [169481.317335] sd 2:0:121:0: [sdr] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Nov 13 13:28:07 joker kernel: [169481.317508] mpt2sas0: removing handle(0x000c), sas_addr(0x5001e671499be001)
Nov 13 13:28:07 joker kernel: [169481.317990] sd 2:0:119:0: [sds] Synchronizing SCSI cache
Nov 13 13:28:07 joker kernel: [169481.318005] sd 2:0:119:0: [sds] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Nov 13 13:28:07 joker kernel: [169481.318126] mpt2sas0: removing handle(0x0010), sas_addr(0x5001e671499be005)
Nov 13 13:28:13 joker kernel: [169487.113794] scsi 2:0:122:0: Direct-Access ATA WDC WD20EARS-00S 0A80 PQ: 0 ANSI: 6
Nov 13 13:28:13 joker kernel: [169487.113805] scsi 2:0:122:0: STP: handle(0x0010), sas_addr(0x5001e671499be005), phy(4), device_name(0x50014ee2046d87f5)
Nov 13 13:28:13 joker kernel: [169487.113809] scsi 2:0:122:0: STP: enclosure_logical_id(0x5001e671499be000), slot(4)
Nov 13 13:28:13 joker kernel: [169487.113916] scsi 2:0:122:0: atapi(n), ncq(y), asyn_notify(n), smart(y), fua(y), sw_preserve(y)
Nov 13 13:28:13 joker kernel: [169487.113921] scsi 2:0:122:0: qdepth(32), tagged(1), simple(0), ordered(0), scsi_level(7), cmd_que(1)
Nov 13 13:28:13 joker kernel: [169487.114125] sd 2:0:122:0: Attached scsi generic sg8 type 0
Nov 13 13:28:13 joker kernel: [169487.130174] sd 2:0:122:0: [sdr] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Nov 13 13:28:13 joker kernel: [169487.162093] sd 2:0:122:0: [sdr] Write Protect is off
Nov 13 13:28:13 joker kernel: [169487.162098] sd 2:0:122:0: [sdr] Mode Sense: 7f 00 10 08
Nov 13 13:28:13 joker kernel: [169487.172765] sd 2:0:122:0: [sdr] Write cache: enabled, read cache: enabled, supports DPO and FUA
Nov 13 13:28:13 joker kernel: [169487.259893] sdr: sdr1
Nov 13 13:28:13 joker kernel: [169487.333271] sd 2:0:122:0: [sdr] Attached SCSI disk
information like that was spamming from random drives in AXX6DRV3GEXP.
Maby that could be a fix in upgrading AXX6DRV3GEXP, but as i said i dont know if i can do that since the readme file does not mention s1200btl so i hope i can do it with s1200btl over IPMB.