NOTE: Shell script is deprecated. Don't use it.
This Python script outputs topology and status information for SAS-attached disks, as well as physical host identifiers (serial numbers, model, hostname). This can help physically locate disks in a host, and can allow the user to infer the presence of missing, misbehaving, or otherwise dead disks.
Disk devices that appear to still be physically present, will have serial number SAS link speed, and disk status exported as part of the device tree. A disk with status that is not "running" should be considered offline, or otherwise not available.
The output of this script is a JSON structure that "walks" all SAS HBAs, their PHY links, ports attached to those links, devices attached to ports, LUNs attached to ports, and finally devices present at a LUN.
/sys/class/scsi_host/host0/device/phy-0:0/sas_phy/phy-0:0/device/port/end_device-0:0/target0:0:0/0:0:0:0/block/sda/
is_sas => /sys/class/scsi_host/host0/device/sas_host
/sys/class/scsi_host/host2/device/target2:0:0/2:0:0:0/block/sdq/
{
"blockdevcount": 16,
"devicecount": 16,
"luncount": 16,
"hosts": {
"host1": {
"phy-1:6": {
"enable": "1",
"port-1:4": {
"end_device-1:4": {
"scsi_target_id": "4",
"target1:0:4": {
"1:0:4:0": {
"state": "running",
"vendor": "ATA",
"sdj": {
"stat": "48856646 0 406574178 2125460 938541 6305 1008954040 5380628 0 3184232 7499056"
},
"model": "SSDCO 99999",
"wwid": "naa.11ab1c111de11f11",
"sas_address": "0x4433221106000000",
"serial": "SOMESERIALVALUE",
"scsi_level": "7"
}
},
"sas_address": "0x4433221106000000",
"bay_identifier": "5",
"enclosure_identifier": "0x500605b008ec6d40",
"phy_identifier": "6"
}
},
"negotiated_linkrate": "6.0 Gbit",
"sas_address": "0x500605b008ec6d44",
"phy_identifier": "6",
"device_type": "end device"
},
"sas_address": "0x500605b008ec6d44",
"state": "running",
"boardname": "SAS9207-8i",
"unique_id": "1"
},
"host9": {
"phy-9:2": {
"phy_identifier": "2",
"negotiated_linkrate": "Unknown",
"enable": "1",
"sas_address": "0x5fcfffff00000001",
"device_type": "none"
}
}
},
"portcount": 16,
"hostcount": 10,
"targetcount": 16,
"system": {
"board_name": "F101",
"chassis_vendor": "Serverco",
"board_vendor": "Board Co.",
"hostname": "somehost",
"product_name": "SuperFast Server"
},
"phycount": 28
}Run this script with root privileges so it is able to retrieve all available SAS bus information.
sudo diskinfo.py