LSI 3916 megaraid_sas problem about hwraid

[egberts]

try running

strace -f megaraid_sas {your command options}

and pipe the output thru one of the following add-on to above command:

| grep "open"
| grep "read"
| grep "write"

some clues can be had unfiltered or filtered as to why it is "hung".

[qasarq]

megaclisas-status 2> strace_megaclisas-status.txt

mea culpa, ther is output, but is incompleate:

-- Controller information --
-- ID | H/W Model | RAM | Temp | BBU | Firmware
c0 | SAS 3916 | 8192MB | 46C | Good | FW: 52.14.0-3790
c1 | AVAGO MegaRAID SAS 9460-8i | 2048MB | 53C | Absent | FW: 51.11.0-2843

-- Array information --
-- ID | Type | Size | Strpsz | Flags | DskCache | Status | OS Path | CacheCade |InProgress
c1u0 | N/A | | | | N/A | N/A | /dev/sdd | None |None

-- Disk information --
-- ID | Type | Drive Model | Size | Status | Speed | Temp | Slot ID | LSI ID
c0u237p0 | HDD | V1K02PVG HGST HUS726T4TALE6L4 VKGNW984 | 3.637 TB | Online, Spun Up | 6.0Gb/s | 31C | [252:0] | 18
c0u237p1 | HDD | V1K02N8G HGST HUS726T4TALE6L4 VKGNW984 | 3.637 TB | Online, Spun Up | 6.0Gb/s | 31C | [252:1] | 19
c0u238p0 | SSD | S45NNC0R704052 SAMSUNG MZ7LH960HAJR-00005 HXT7904Q | 893. Gb | Online, Spun Up | 6.0Gb/s | 30C | [252:4] | 17
c0u238p1 | SSD | S45NNC0R704061 SAMSUNG MZ7LH960HAJR-00005 HXT7904Q | 893. Gb | Online, Spun Up | 6.0Gb/s | 30C | [252:5] | 16
c0u239p0 | SSD | S45RNC0RA07319 SAMSUNG MZ7LH240HAHQ-00005 HXT7904Q | 223.0 Gb | Online, Spun Up | 6.0Gb/s | 30C | [252:6] | 15
c0u239p1 | SSD | S45RNC0RA07547 SAMSUNG MZ7LH240HAHQ-00005 HXT7904Q | 223.0 Gb | Online, Spun Up | 6.0Gb/s | 30C | [252:7] | 14
c1u0p0 | SSD | NVMe SAMSUNG MZQLB1T9402QS439NC0R706407 | 1.745 TB | Online, Spun Up | Unknown | 40C | [98:4] | 1
c1u0p1 | SSD | NVMe SAMSUNG MZQLB1T9402QS439NC0R706434 | 1.745 TB | Online, Spun Up | Unknown | 42C | [98:6] | 0

array information for 3916 is missing, system "hang" while any other read/write opentaion on disks hangs also.
strace_megaclisas-status_open_read_write.txt