Network upgrade

Added capacity for an extra six hosts on my LAN and now most of my network infrastructure supports 2.5Gbps ethernet speeds. And my janky rack is obsolete now.

The equipment is four TP-Link TL-SG108-M2 ethernet switches which I got from Amazon.

Oh, and I should probably mention that the TP-Link switches come with piddly little adhesive feet, but I didn’t use them, I got some of these big honkin’ ones instead: 25x Rubber Feet Pads Self Adhesive Isolation Feet Speakers Foot Shock Absorption. My logic is that more space between switches equals better cooling.

John's four new Ethernet switches

John's janky rack

Interlude #2: Mail Call! Plus Two Old Books And A Floppy Disk | In The Lab With Jay Jay

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Silly Job Title: Ohm Oracle

Old Book: Electric Circuits by J. Richard Johnson published 1984 with 888 pages.

Today we pop open a few bags of stuff that has arrived in the mail.

I mention about the trouble I had with my Western Digital Purple drives.

I mention about my new Western Digital Black 1TB NVMe M.2 SSD WDS100T3X0E drives.

I mention about my Educational 555 PCBs which have arrived from PCBWay. The website of the designer is given as: basitelektronikprojeler.blogspot.com.

The systems of units mentioned in the old book Electric Circuits are discussed at MKS system of units and Centimetre–gram–second system of units.

The 256GB M.2 NVMe drives I got to use as my ZFS L2ARC cache are these: TOSHIBA KIOXIA 256GB BG5 NVMe SSD M.2 2280 – NEW GEN4.

The automotive fuses I got are these ones: Car Fuse Blade Fuse Kit Fuses Automatic Truck Blade The Fuse Insurance Insert Insurance of Xenon Piece Lights Auto Accessories.

The test clips I got are these ones: 10X Universal Chip clamp micro IC clamp SOP SOIC TSOP MSOP SSOP SMD IC Test Clip pin Socket Adpter Programmer for logic analyzer.

The book which arrived in the mail was The SCSI Bus and Ide Interface: Protocols, Applications and Programming (2nd Edition) by Friedhelm Schmidt published 1997 with 396 pages.

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OULLX NSS-681HDMI-RJ45 Cable TesterThis is an image of the product.notes

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ChatGPT on RMA for SMART errors

ChatGPT told me this:

ChatGPT 3.5

User:
are SMART errors good enough reason for RMA?

ChatGPT:
SMART (Self-Monitoring, Analysis, and Reporting Technology) errors are indicators that a storage device, such as a hard drive or SSD, has detected potential issues with its health or performance. SMART errors can cover a range of issues, including bad sectors, high temperature readings, and other abnormalities.

Whether SMART errors are considered a good enough reason for a Return Merchandise Authorization (RMA) depends on the severity and type of errors, as well as the specific policies of the manufacturer or seller. Here are some general considerations:

Severity of Errors: Some SMART errors may be relatively minor and not immediately indicative of a catastrophic failure. Others, particularly those related to critical components like bad sectors, can be more serious. If the errors suggest a high risk of imminent failure, it could be a valid reason for an RMA.

Warranty Status: If your device is still under warranty, the presence of SMART errors is often a reasonable cause for an RMA. Warranty policies vary between manufacturers, so it’s important to check the terms and conditions provided by the company.

Manufacturer’s Policies: Different manufacturers have different policies regarding what constitutes a valid reason for an RMA. Some companies may require a certain threshold of errors or specific criteria to be met before they authorize a return.

Backup and Data Loss: Before seeking an RMA, it’s crucial to back up your data, especially if the SMART errors suggest potential drive failure. Some manufacturers may request proof that you’ve backed up your data before processing an RMA.

Communication with Support: If you’re experiencing SMART errors and are considering an RMA, it’s a good idea to contact the manufacturer’s customer support. They can provide guidance on whether the errors are within acceptable limits or if they warrant a replacement.

Remember that not all SMART errors are equal, and some devices may continue to function adequately despite certain types of errors. However, if you’re concerned about the health of your storage device and it’s under warranty, it’s generally a good idea to reach out to the manufacturer for guidance on whether an RMA is necessary.

RMA WD Purples

I got two Western Digital 8TB SATA Purples which arrived from Amazon today. When I plugged them into my first computer the BIOS hung for a few minutes then powered off the computer. Huh? So I took the drives out and put them in another computer, and before the BIOS screen I got this:

Western Digital Purple drive asking for password

I tried a few passwords (blank, “admin”, etc) but nothing worked. I searched for the default password, couldn’t find one. I installed the WD Security software on my MacBook Pro and tried connecting the drive with two different USB adapters, but nothing worked.

I’m just gonna send these back and never buy Western Digital purples again.

My RMA note are:

Why are you returning this? Item defective or doesn’t work

Comments (required): It asked me for a password, but it didn’t give me the password. I wasted a lot of time on this trying to find and fix the problem.