Hitachi Hdd Driver
Brandi Baylon
I try to use the LCD 16x2 supplied with my kit.
I did all the wiring as explained in the lesson.
When I power the Mega 2560 controller, in the first line is displayed 16 full white rectangles and nothing in the second line.
I downloaded the HelloWord sketch but that changed nothing.
What can be wrong ? I tested another LCD and get the same result. I cheked the wiring, it's correct for the Mega 2560. I modified pin number according to the specs.
I am doubting about the harware of this LCD display because I don't think it's normal that when it is powered up, it has this first line of rectangles whites and the second line empty. Nonetheless, above the
Answer to points 1.2.3. : my sketch including the wiring and the Library used which is Arduino 1.8.0 ->
You can also use other pins of your MEGA, but then you have to adjust the pin assignment in the constructor as described above; the only condition is, that the constructor's pin assignment corresponds to your wiring.
So pls check again, if all of your wiring is EXACTLY as I listed here (identical with the instructions in your example sketch). Even if so - a common issue for beginners with LCD displays is, to have no solid connections between Arduino and LCD display.
We had newbies here which didn't solder the wires at all, just bent them around the pcb hole -> this is a no go and will never work! Also: "cold" solder spots are no good idea. Your connections have to be solid, anything else will fail or cause trouble.
I check again the wiring, everything is as you detailed above, in comformity with the C++ code.
For the connections, my LCD 1602 module is out of the box from the Arduino kit and come with 16 pins that fit in the 816 tie-points board. I did other prototypes with this board and never had bad connections.
If you think that at power on the module must be as explained (one solid rectangle line), the only remaining problem seems the driver in the librairy. I don't know how to check that...(I am a retired sofware engineer mainly on Windows and have few hardware knowledges).
If the wires are going to the correct place, be sure to check the wires themselves. The fact that you see the white blocks and not scrambled data, would lead me to suspect the RS,RW, or E connections.
Also - it's hard to see if the blue and red lines that are printed on your breadboard are continuous from one edge to the other. If there are breaks in the lines near the middle of the board then there also are breaks in the horizontal bus and you may not be getting power to pins 1 and 2 of your display.
A checked all the wiring, I saw that many of the wires that are supplied in my kit are defectives. I succeed when changing some wires to have 2 lines of solid rectangles. As said rtp007, 90% of troubles are in the wiring. I will send some new after I solved all this.
Thank you again for your help.
If using a new resource group for exclusive use by an OpenStack system,create a new resource group, and assign the necessary resources, such asLDEVs, port, and host group (iSCSI target) to the created resource.
(Integer) Interval at which remote replication pair status is checked. This parameter is applied if the status has not changed to the expected status after the time indicated by this parameter has elapsed.
Beginning with the 2023.1, If you use Global-Active Device (GAD),you can make the data of individual volumes redundant between twostorage systems, thereby improving the availability of the storage systems.For details, see the Global-Active Device User Guide.
Before using Global-Active Device, create the prerequisite environment,such as connecting remote paths, configuring a quorum disk,and creating a virtual storage machine (VSM), by other storage systemmanagement tools. Hitachi block storage driver supports the followingconfigurations.
You must register the information about the secondary storage system to theREST API server in the primary site and register the information about theprimary storage system to the REST API server in the secondary site.For details about how to register the information, see theHitachi Command Suite Configuration Manager REST API Reference Guide orthe Hitachi Ops Center API Configuration Manager REST API Reference Guide.
Reserve unused host group IDs (iSCSI target IDs) for the resource groupsrelated on the VSM. Reserve the IDs in ascending order. The number of IDsyou need to reserve is 1 plus the sum of the number of controller nodesand the number of compute nodes. For details on how to reserve a hostgroup ID (iSCSI target ID), see Global-Active Device User Guide.
The LUNs of the host groups (iSCSI targets) of the specified ports onthe primary storage system must match the LUNs of the host groups(iSCSI targets) of the specified ports on the secondary storage system.If they do not match, match the LUNs for the primary storage system withthose for the secondary storage system.
When you use a same storage system as secondary storage system forGlobal-Active Device configuration and backend storage system for generaluse at the same time, you cannot use the same ports between differentbackend storage systems.Please specify different ports in the configuration optionshitachi_target_ports, hitachi_compute_target_ports, orhitachi_rest_pair_target_ports between different backend storagesystems.
In order for you to create volumes with the Global-Active Device attributespecified, you must first create a volume type that contains thehbsd:topology=active_active_mirror_volume extra-spec.You can do this as follows:
You cannot create a volume for which the deduplication and compressionfunction is enabled, or creating a volume will be failed with the errorMSGID0753-E: Failed to create a volume in a GAD environment becausededuplication is enabled for the volume type..
While setting up the environment, set a virtual LDEV ID for every LDEVspecified by the configuration option hitachi_ldev_range parameteron the primary storage system using storage management softwarebecause virtual LDEV IDs are necessary for GAD pair creation.
The maximum number of Thin Image pairs that can be created for each LDEVassigned to a volume (or snapshot) is restricted on a per-storage-system basis.If the number of pairs exceeds the maximum, copying cannot proceed normally.
For details about how to enable this setting, see the description of poolmanagement in theHitachi Command Suite Configuration Manager REST API Reference Guide or theHitachi Ops Center API Configuration Manager REST API Reference Guide.
In Hitachi block storage driver, if host groups are created automatically,host groups are created for each compute node or VM (in an environment thathas a WWN for each VM). If you do not use the port scheduler function,host groups are created and the same WWNs are registered in all of the portsthat are specified for the configuration optionhitachi_compute_target_ports or for the configuration optionhitachi_target_ports.For Hitachi storage devices, a maximum of 255 host groups and 255 WWNs can beregistered for one port.When volumes are attached, the upper limit on the number of WWNs that can beregistered might be unexpectedly exceeded.
For the port scheduler function, when the cinder-volume service starts,the Fibre Channel Zone Manager obtains the WWNs of active compute nodes andof active VMs. When volumes are attached, the WWNs are registered ina round-robin procedure, in the same order as the order of ports specifiedfor the configuiration option hitachi_compute_target_ports or for theconfiguiration option hitachi_target_ports.
If a host group already exists in any of the ports specified for theconfiguration option hitachi_compute_target_ports or for theconfiguration option hitachi_target_ports, no new host group will becreated on those ports.
Defining particular ports in the Hitachi-supported extra spechbsd:target_ports determines which of the ports specified by theconfiguration options hitachi_target_ports or the configuration optionhitachi_compute_target_ports are used to create LUN paths during volumeattach operations for each volume type.
In a Global-Active Device configuration, the ports specified forthe extra spec hbsd:target_ports must be specified for both theconfiguration options for the primary storage system(hitachi_target_ports or hitachi_compute_target_ports)and for the secondary storage system(hitachi_mirror_target_ports orhitachi_mirror_compute_target_ports).
The Hitachi WH18DBDL2 has a triple anvil design which is supposed to give you more power with less vibration. Coupled with a brushless motor for power and efficiency, this impact driver weighs just 2.9 lbs with a 3.0 Ah compact battery.
The last thing that annoys me about the Triple Hammer is the chuck. Many newer impacts have one-handed chucks where you just push the bit into the chuck and it locks in place. With the Triple Hammer chuck, you have to pull the ring forward to even get the bit to go in all the way. Then when you let go of the ring it locks the bit in place.
While both models have a variable speed trigger, they both have a different feel. The Triple Hammer definitely has a lighter pull than the Surge, and so you have to be aware of how hard to squeeze the trigger when switching back and forth between the different tools. Neither trigger is better or worse, the weight of the pull is just a matter of what you are used to and what you prefer.
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