CompTIA SK0-005 Exam - Topic 1 Question 50 Discussion

Actual exam question for CompTIA's SK0-005 exam

Question #: 50
Topic #: 1

A technician replaces a single faulted disk in the following array RAID 10, Four 15K SAS HDD The technician replaces it from a disk in spare parts, and the array rebuilds the data in a few minutes. After the array rebuild is complete, the system reports the IOPS on the disk array have dropped by almost 60% Which of the following should the technician investigate first?

ACheck the RAID controller (or background rebuild tasks

BCheck the firmware version on the newly replaced disk.

CCheck the RPM speed on the newly replaced disk-

DCheck the cache settings on the RAID controller.

Show Suggested Answer

Suggested Answer: C

In RAID 10 arrays, disk performance is crucial, especially if they are high-speed 15K RPM SAS HDDs, as each disk in the array is part of a mirrored pair that also stripes data with another pair. When replacing a disk, it's essential that the new disk matches the specifications of the others, especially in terms of rotational speed (RPM). If the replaced disk is slower, it can significantly reduce the Input/Output operations per second (IOPS) of the entire array. This is because all disks need to work in tandem, and the slowest disk can become a bottleneck. Thus, checking the RPM of the newly replaced disk is a sensible first step to ensure it matches the performance of the other disks in the array.

by Galen at Apr 14, 2024, 07:36 PM

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Leota

3 months ago

RAID controller tasks can mess with performance, so that’s worth a look.

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Marti

3 months ago

Are we sure the new disk is even the same RPM?

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Salina

3 months ago

Wait, a 60% drop? That's pretty wild!

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Alica

4 months ago

I think the cache settings could be the issue too.

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Theodora

4 months ago

Definitely check the firmware version on the new disk first.

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Gertude

4 months ago

I think the cache settings on the RAID controller could also be a culprit. If they’re not optimized, it might explain the drop in performance.

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Jolene

4 months ago

I practiced a similar question, and I feel like the RPM speed of the new disk could be a factor. If it’s slower, that would definitely impact IOPS.

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Samira

4 months ago

I’m not entirely sure, but I think checking the firmware version on the new disk might be important too. If it’s outdated, that could cause issues.

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Lai

5 months ago

I remember something about checking the RAID controller first, especially if there are background rebuild tasks running. That could affect performance.

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Marvel

5 months ago

Based on my experience, I'd start by checking the RAID controller settings and any background rebuild tasks. That's usually the first place to look when IOPS drop after a disk replacement.

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Whitney

5 months ago

I'm a bit confused here. Could the firmware on the new disk be the issue? Or maybe the RPM speed is different?

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Queenie

5 months ago

Okay, let's see. The key details are that the IOPS dropped after a disk replacement in a RAID 10 array. I'm leaning towards checking the RAID controller first.

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Winfred

5 months ago

Hmm, this seems like a tricky one. I'll need to think it through carefully.

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Lisbeth

5 months ago

Hmm, I'm a bit unsure about this one. I need to review my notes on control charts to make sure I understand the different components.

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Celestina

5 months ago

I'm a bit confused on the best approach here. I'll need to review the features and limitations of each tool to determine the most efficient solution for this scenario.

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Christiane

5 months ago

Hmm, I'm a little confused by the wording here. It's talking about a "DC upgrade tool" and "concurrent units" - I'm not sure I fully understand the context. I'll need to think this through carefully.

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Filiberto

5 months ago

This is straightforward. The classification tree shows 4 factors, so the minimum number of test cases using pairwise testing will be 8. I'm confident I can get this right on the exam.

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Becky

5 months ago

Hmm, I'm a little unsure about this one. The wording of the question and the answer choices is a bit tricky. I'll need to think through each option carefully to make sure I understand the nuances.

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Hermila

5 months ago

Okay, I've got this. You need to expand the Server, then CORE, click on the server name, and then follow the link for the Network Management GUI. That should open up the 9810 listener window.

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Shenika

2 years ago

Yes, checking all these factors is important to pinpoint the root cause of the performance drop.

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Jin

2 years ago

We should also consider checking the cache settings on the RAID controller. It could be affecting performance.

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Joanne

2 years ago

That's a good point. Firmware issues can definitely cause performance problems.

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Lorrie

2 years ago

But what about checking the firmware version on the replaced disk? Maybe it's not compatible.

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Shenika

2 years ago

Yeah, if the IOPS dropped so significantly, it could be a controller issue.

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Jin

2 years ago

I think we should check the RAID controller first.

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Lilli

2 years ago

I think we should also check the cache settings on the RAID controller, that could be causing the drop in performance.

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Tyisha

2 years ago

That could be a good idea too, the issue might be related to the firmware.

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Brigette

2 years ago

But what about checking the firmware version on the newly replaced disk?

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Tamra

2 years ago

I agree, the drop in IOPS could be related to the RAID controller.

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Tyisha

2 years ago

I think we should investigate the RAID controller first.

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Lawana

2 years ago

Wait, wait, wait. Did anyone consider the RAID controller's cache settings? If those got messed up during the rebuild, that could also lead to a major IOPS drop. Definitely worth checking out.

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Leota

2 years ago

You know, I'm just curious, has anyone ever tried turning the RAID array off and back on again? That's like the IT version of 'have you tried turning it off and on again?'

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Lonna

2 years ago

D) Check the cache settings on the RAID controller.

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Shalon

2 years ago

C) Check the RPM speed on the newly replaced disk.

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Lashawnda

2 years ago

B) Check the firmware version on the newly replaced disk.

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Reynalda

2 years ago

A) Check the RAID controller (or background rebuild tasks

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Jaime

2 years ago

Yeah, that's like the IT version of 'have you tried turning it off and on again?'

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Elouise

2 years ago

Have you tried turning the RAID array off and back on again?

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Stephanie

2 years ago

Hmm, I don't know. The firmware version might be a good place to start too. If it's not compatible with the array, that could definitely cause some issues.

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Casandra

2 years ago

Hmm, good point. The cache settings on the RAID controller are definitely worth investigating. We don't want to overlook the obvious.

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Jolanda

2 years ago

True that, Dusti. Though I guess we'll have to wait and see what the technician finds. I just hope they don't end up having to replace the whole array. That would be a real headache.

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Latrice

2 years ago

Hold on, what if it's a caching issue with the RAID controller? That could also cause a significant IOPS drop.

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Galen

2 years ago

Maybe we should also check the firmware version on the newly replaced disk, just to be thorough.

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Jimmie

2 years ago

But could it also be related to the RPM speed of the replaced disk?

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Ettie

2 years ago

That's a good point. We should check the cache settings on the RAID controller.

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Dusti

2 years ago

Haha, good point David. Though if I had to bet, I'd still put my money on the RPM speed. Can't beat good old-fashioned raw performance, am I right?

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Gerardo

2 years ago

Yeah, I'm leaning towards checking the RPM speed on the new disk. That could definitely impact the overall IOPS of the array.

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Lavera

2 years ago

I think it might have something to do with the new disk that was used to replace the faulted one. The firmware version or RPM speed could be the culprit.

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Rozella

2 years ago

Wow, this question is tricky! I'm not sure what to make of it. The IOPS drop by 60% after the rebuild, so something is definitely going on.

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