All Questions
Tagged with ssd hard-drive
106
questions
0
votes
0
answers
22
views
USB SATA adapters not working with SSDs
Has anyone else experienced issues with USB SATA HDD adapters working fine for traditional hard disks but not for SSDs?
I haven't been able to find any information about this, but I've now encountered ...
- 847
0
votes
1
answer
403
views
How to combine an SSD with two HDDs in a RAID1-ish hybrid setup?
Coming from Linux SSD as HDD cache, I'd like to set up an SSD (or rather a partition thereon) as cache for basically a RAID1 of two HDDs. But since the data might remain cached on the SSD for while, I ...
- 388
0
votes
0
answers
81
views
Disk doesn't show any partition table or partition changes
I wanted to clone an encrypted drive to a new drive, so I set up CloneZilla to do a disk-to-disk clone. At the beginning, it said 9 hours to run, so I let it run overnight. The next day, it had 145 ...
- 47
2
votes
1
answer
237
views
RAID controller detecting SSD as foreign after every reboot
My server, an R610, has been detecting my SSD as foreign after every reboot. It has a PERC 6/i RAID controller, but there's no actual RAID stuff (I just have all the drives as their own VDs).
This had ...
- 282
0
votes
0
answers
213
views
What's the best means to clone the root linux hard drive to a new drive?
I bought a new enterprise grade SSD to replace my Samsung SSD. It was $500, not cheap. Anyway, the purpose is to have a more reliable and longer-lasting root hard drive, since a non-enterprise drive ...
- 103
1
vote
1
answer
2k
views
Unlock SATA SSD locked with Dell's HDD password option in BIOS
Latest problem is a locked SATA disk. It is a Samsung 870 QVO SSD. It has been locked a long time ago with the Dell BIOS password utility. But because an admin password was set, the system never ...
- 21
2
votes
0
answers
403
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preventing big HDD's to spinup by using (small) SSD's as cache
I want to build a NAS that is as quiet, efficient and cool as possible.
In this scenario, I have the following parts:
-4 SATA connections to the motherboard.
-2 Hard drives, one is 1TB, the other is ...
- 21
-2
votes
1
answer
42
views
SSD I/O slows down system
My HDD was getting full, so I added a new SSD and tried moving files to it. For some reason, this bogs down the whole system to the point where it's not usable. This never happened with HDDs when ...
- 101
0
votes
1
answer
100
views
How to verify if a disk was ever written to
How can you verify if a disk is fresh and has had no write from the factory? I have a client that needs to make sure that the disks he revived are cleaned and weren't tampered with from the time it ...
- 427
1
vote
1
answer
2k
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Do I need to replace my NVME SSD?
I have a simple server setup:
2 NVME SSD disks (both SAMSUNG MZVLB1T0HALR-00000 for 1TB) united into RAID0.
OS Ubuntu 19.04
Today my system stopped responding. Reboot didn't help.
I connected via KVM ...
- 111
0
votes
1
answer
10k
views
Ceph hardware sizing calculator
I would like to calculate the Hardware sizing for a ceph cluster. There are so few references to the sizing, that I try to get these details here in the community.
E.g. what shall i have depending on
...
- 277
0
votes
1
answer
88
views
Limitations to using many SSDs in computing server [closed]
This is a beginner's question:
We have a powerful computing server for roughly 10 users which will be increasingly used for data processing. In the past the main bottleneck was I/O.
I was wondering ...
- 113
5
votes
1
answer
6k
views
Unit for Total_LBAs_Written in SMART data
I have 3 machines with disks (actually, SSDs) in RAID1, purposely with different brands in an attempt to make it improbable to loose them both simultaneously due to wear-out. They are functional.
...
- 375
74
votes
13
answers
48k
views
SSD or HDD for server
Issue
I have read many discussions about storage, and whether SSDs or classic HDDs are better. I am quite confused. HDDs are still quite preferred, but why?
Which is better for active storage? For ...
- 891
5
votes
2
answers
1k
views
Server Hot Swap Hard Drives
We have a HP Proliant DL380 G9 server. We have a separate data drive which consists of 4 x 1TB 7.2k 6Gb hot-swappable SAS drives RAID 5'd to provide a 3GB logical drive. We've noticed the performance ...
David Colley
26
votes
2
answers
20k
views
Linux SSD as HDD cache
I have a Linux server system installed on an SSD and an HDD for user data. As there is space left on the SSD, I want to use it as a read cache for the HDD.
Looking at the possibilities, I found:
dm-...
- 431
-2
votes
1
answer
367
views
SSD disks VS SATA disks and SAS disks [closed]
as all know there are many type of disks
while the famous are
SSD disks
SATA disks
SAS disks
dose SATA/SAS disks can be nearly as SSD disks? about IO and performance?
how much SSD disks are ...
- 461
0
votes
1
answer
222
views
Dose zookeeper servers must use SSD disks?
we want to install kafka cluster and 3 zookeeper servers
kafka should use the zookeeper servers in order to save the metadata on the zookeeper servers
ZK Data and Log files should be on disks, which ...
- 461
1
vote
1
answer
363
views
Zookeeper best practice - using only SSD disks
we have HDP clusters version 2.6.0 / 2.6.1 ( hortonworks ) , and maybe in the future the version 3.0
I searched a lot in HORTONWORKS documentation , but not found the details about using SSD disks ...
- 461
0
votes
0
answers
97
views
Using hdparam for more strenuous tests
So I am tasked with getting some strenuous raw hard drive performance tests. We started with FIO but this has proven to be ineffective as the results are poor in windows and linux.
I tried Bonnie++ ...
- 217
0
votes
1
answer
36
views
Requirements analysis for CPU-bound task writing to disk
I have a data-analysis application which is CPU-bound, and produces ~35 MB/s of data per thread of execution.
I'm trying to work out how many threads I can run concurrently, and be able to write to ...
- 185
0
votes
1
answer
60
views
Strange file corruptions in ext4
Recently I came in contact with what appears to be disk corruption scenarios, and I would like to understand them better.
I have a build server which I work with daily. During one full build of a ...
- 572
1
vote
4
answers
494
views
Why does disk latency drop during periods of heavy writes?
Looking at the output of Munin's diskstats plugin (which is reading from /proc/diskstats) I'm noticing what seems peculiar to me. The disk is a SSD, and I would assume, magnetic or solid state, that ...
- 11
0
votes
1
answer
769
views
Improving SQL speed - Can SSD and more RAM be effective?
I'm running a website on a VPS package on nomral Hard drive, and 3.25 GB RAM.
I created a test page and realized that by simply including an SQL command such as:
SELECT Name from table where Name IN ...
- 101
3
votes
2
answers
152
views
Difference between hard drives [closed]
I recently purchased an HPE ProLiant DL380 Gen9 Server for my company. This is all new to me and I am trusted to creating my companies IT infrastructure(hired to do software). I'm having a hard time ...
- 129
1
vote
1
answer
3k
views
Can I move from SAS HDD to SSD?
I have an HP ML350 Gen 8 server with 8 SAS HDDs of 600 GB each. Since the drives are a little bit old now, I would like to replace them with SSDs.
I would like to know if I can do this, and if I ...
- 111
0
votes
0
answers
498
views
Are SSD/HDD hybrid drives a good choice as drives in either BRTFS or md raid?
I'm currently planning to revamp a "computer". Using the term "computer" because I'm not sure what it's role exactly is...
It runs Ubuntu (17.10 / artful), it's being used as multi-seat desktop for ...
2
votes
3
answers
511
views
Which is the worst-case scenario: dying HDD or SSD?
We all know SSD offer many advantages (such as speed) over HDD drives but which one is safer when it comes to data rescue if, for instance, the drive is failing?
From my understandings on SSD drive ...
- 375
0
votes
0
answers
25
views
Hard drive write operation expected rates
It is known that SSDs are suboptimal for "high-write" environments. What common business and/or personal computing use cases are "high-write" situations, which are "low-write" situations, and what ...
- 121
3
votes
1
answer
809
views
Monitor the Garbage Collector of an SSD
The SSD controller triggers the garbage collection routines on a specific ship or block when a certain threshold of either invalid pages or written pages is met, based on the GC policy (my guess is ...
- 273
9
votes
2
answers
8k
views
Why do sequential writes have better performance than random writes on SSDs?
An LBA (logical block addresses) is a mapping table implemented in the FTL to match between logical and physical pages/blocks in SSDs, my guess is that most SSDs (at least when they are empty) keeps ...
- 273
1
vote
1
answer
705
views
How to calculate /get the UBER value from S.M.A.R.T measurements in SSDs
UBER is a metric for the rate of occurrence of data errors, equal to the number of data errors per bits read over the entire lifetime of an SSD.
Mathematically:
The numerator is the total count of ...
- 273
0
votes
3
answers
3k
views
clone nvme drive with 4096 sector size to ssd with 512 sector size
I have an nvme drive with a logical and physical sector size of 4096.
The block size of this drive as reported by blockdev --getbsz command to be 4096 as well.
The destination drive is an SSD with a ...
1
vote
1
answer
4k
views
Can I install SQL Server on an external Hard Disk? [closed]
I have a desktop PC (Windows 7) with 1 TB HDD which has SQL Server 2008 R2 installed. Now it is getting replaced by a laptop with 500G SSD drive. This would be first experience working with a SSD. But ...
- 111
3
votes
1
answer
147
views
Isolate a failed SSD drive
I have recently had a Samsung 840 Pro 256 GB SSD fail on our server. The drive was configured in a RAID 1 array and a reboot was sufficient to bring things back online.
When looking at the Intel ...
- 395
0
votes
1
answer
43
views
Jr. Sys Admin mistake, Can/Do I need to Un-RAID 0 my drives?
Backstory: Just started as a Jr. Sys Admin, Cleaning up data center, re-purposing workstations I find to update currently used workstations.
I started off with a terminal that had some potential, i7-...
2
votes
1
answer
564
views
Is There a Performance Benefit by Connecting a Single SSD Hard Drive to a RAID Controller?
I recently provisioned a new Windows Server 2012 R2 server at my hosting company. This is my first time using an SSD as my hard drive and the system is currently utilizing a single 800Gb drive (split ...
- 123
1
vote
0
answers
38
views
Arrays removed by removing one disk?
I had an issue this weekend with a server at work, one of the Datastores (Raid1 2x300GB) on esxi filled up and the guest OS got suspended, we had nothing to attach an NFS to the esxi and all disk ...
- 13
2
votes
1
answer
4k
views
hdparm unlock ssd with correct password encoding
I have an old password protected SSD connected via USB to my Linux System. I'm trying to unlock it with hdparm.
Problem is my password was ./perspective (it doesn't matter now because I only used it ...
- 121
1
vote
1
answer
3k
views
Selecting an SSD to act as boot volume in an HP server
A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because:
...
- 1,852
0
votes
2
answers
253
views
80 pin SCSI Raid Controller to SATA SSD's on IBM e336
I have an Old IBM e336 1U Sever. Currently the only Hard drive in the system is a Ultra160 SCSI drive. This drive is old and making some noises indicating that its life is going to end soon. Though ...
- 125
4
votes
1
answer
821
views
How to disable automatic garbage collection on an SSD?
Solid State Drives (SSD) have a garbage collection functionality which makes space from deleted files available. It is triggered
automatically by the drive
via a TRIM command sent by the OS
Is there ...
- 3,607
3
votes
1
answer
217
views
SMART self tests - worthwhile if already doing weekly RAID checks and smartctl -a output being monitored?
If a server is configured to check the RAID weekly using /usr/sbin/raid-check and the output of smartctl -a is being monitored, is it worthwhile to also have regular SMART short and long self tests be ...
- 1,318
20
votes
2
answers
121k
views
How to unlock an SSD disk with hdparm?
I have an SSD disk with password protection, but the password was lost long time ago... so I tried to erase the ATA security with the hdparm command.
With "hdparm -I", the disk information ...
- 303
29
votes
9
answers
11k
views
Consumer (or prosumer) SSD's vs. fast HDD in a server environment
What are the pro's and con's of consumer SSDs vs. fast 10-15k spinning drives in a server environment? We cannot use enterprise SSDs in our case as they are prohibitively expensive. Here's some notes ...
- 515
0
votes
1
answer
3k
views
Munin disk utilization calculation.
I have got intel ssd(series 530, 480gb). Data from intel site:
Sequential Read - 540 MB/s
Sequential Write - 490 MB/s
Random Read - 48000 IOPS
Random Write - 80000 IOPS
Current load is about 5000 ...
- 123
1
vote
3
answers
3k
views
Hard disk / SSDs - detection and handling of errors - is silent data corruption reliably prevented?
When an error occurs on a drive, is it correct to assume that it will always be detected and reported to the OS (if software RAID such as mdadm) or RAID controller (if hardware RAID) as a failed read (...
- 1,318
-1
votes
2
answers
66
views
how do I know if an SSD reaches its performance capability?
I was monitoring a new db server with SSD RAID-10 installed. It works fine for now but I was worrying someday it could reach its capability as the business goes on. So how can I know that before it's ...
- 111
2
votes
3
answers
12k
views
Convert RAID from Mechanical Disks to SSD?
Any issues with converting a Mechanical Disk RAID to SSD by replacing the drives one-by-one?
I couldn't find anyone online who has done this, so let's make this the place to post about it.
If you ...
- 21
3
votes
4
answers
17k
views
What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?
I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
- 155