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Questions tagged [sas]

Serial Attached SCSI (SAS) is a computer bus used to move data to and from computer storage devices such as hard drives and tape drives. SAS depends on a point-to-point serial protocol that replaces the parallel SCSI bus technology that first appeared in the mid 1980s in data centers and workstations, and it uses the standard SCSI command set.

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RAID0 on 16 8TB HDD's writes at speed 3-4 MB/s only

I have a pretty modern RAID hardware for this: Controller: Intel RS3SC008 SAS Expander: Intel RES3FV288 HDDs: Seagate ST8000AS0002-1NA17Z For the moment, I don't have BBU, which should be Intel AXXRMFBU4. SAS expander is properly connected with…
Bart
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Connect extra 4 SAS HDDs to HPE Proliant Dle360 gen9

I have an HPE Proliant Dle360 gen9 configured with 1x 500w PS, 32GB ram, 1x 12 core Xeon cpu. At the moment its 4 front bays are occupied by 4 SAS HDDs. I want to replace them with 4 SAS SSDs and also reconnect the 4 SAS HDDs some other way. Do I…
Michael
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mix SAS and SATA HDDs in RAID 0

Specs for some RAID controllers (for instance LSI 9261-8i) say that it's possible to mix SAS and SATA disks in the same RAID array but such practice is discouraged (but without explanations why). There was mention here on SF that some admins use…
Mark Smirnov
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Maximum write speed of HP Ultrium 1760 drive

The write speed of the HP Ultrium 1760 drive is specified as 120MB/s with LTO-4 media and 80MB/s with LTO-3 media. However I get half of that - 80/40 MB/s respectively. The connector is SFF-8482 at the drive and SATA at the controller. The SFF-8482…
NickSoft
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Does IO performance degrade when a SAS SSD is attached with redundancy?

I have some Seagate Nytro SSDs (model xs800le70004), SuperMicro SAS3 JBODs (2C models with redundancy), LSI 9300 SAS3 Cards, and SAS HD Cables (SFF-8644). When the SSDs are attached with both primary and redundant links, the performance drops to 72%…
GoldenNewby
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SAS drives not getting detected + orange light

I am using a HP Proliant server with the original hard drives. They have worked before. I had it powered off for like two weeks. After trying to power it on again, the two SAS drives had an orange light (was green two weeks prior) and the RAID…
Ninto 1
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Debian SAS Not Attaching As SD device (another does)

I have an x4100 with 4 drive slots 3 drives are part of the RAID 1E. On the RAID Array I have installed Debian. I am using the 4th slot for accessing file storage drives. The HP 600GB drive attaches successfully as an sd device. The HITACHI 146GB…
Dorothy
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New server has a HBA mini-sas-hd connector. How can I connect 24 disk to one raid card?

Is it possible to connect all 24 disks to one raid card ? How do I connect these physically ? Do I need an expander ? Or is it-mode flushing sufficient ? I read it-mode flushing permits up to 1024 drives and software raid. (mdadm bcache megacli etc…
Gediz GÜRSU
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Replace SAS disk for HP ProLiant 380DL Raid1

I have HP Proliant Server 380DL G9 with 5 SAS disks, (2 disks for raid 1,also 2 disks raid 1 and the last one is raid 0) one of the disks in the 1st raid 1 is flashing orange, so its recommended to replace the flashing disk with new one. How to…
Extreme FOX
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Very Low IOPs on Array of 16x 15K SAS Drives

I'm having issues with one of our servers that is running 16x 900GB 15K SAS drives in a RAID 1+0 Array on a PERC H710P, under normal load its doing ~450 IOPs (almost all writes) and has a backlog of ~80ms, when testing the speed with dd if=/dev/zero…
philliplcg
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What is the difference between SFF-8482 and SFF-8082 connectors?

A popular way to connect SAS hard drives to a SAS card having SFF-8087 sockets is to use a SFF-8087 to SFF-8482 cable. One can also find on the market SFF-8087 to SFF-8082 cables, but I could find almost no documentation about the SFF-8082 connector…
OuzoPower
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How do i get EMC hard drives to work in a Dell Poweredge R510?

Recently I have acquired a Dell Poweredge R510 12 bay LFF 2U server without any drives. I made an impulse buy for 12x 3TB hard drives because they were a great deal and i didn't think much in the way of compatibility issues. After trying to set the…
user1326789
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Dell Precision T5600 SAS issue

I'm currently having some issues with my Dell Precision T5600 Workstation (more specifically the Intel C600 SAS Controller). My problem is that my 2x2TB SAS harddisks are completely unreadable for my computer. They are connected to HDD0 and HDD1 on…
Kristian Pusarn
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Power requirements for SAS enclosures

I have a Supermicro 4u enclosure with dual 1400 watt power supply running on 220v. There are 24 drive bays. The power supply is rated at 4amps for the 5v output. If I have 24 drives that requires .75 amps on the 5v, the math isn't adding up in…
user394064
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How do I configure Dual Domain SAS for my D2600 enclosure and Linux

I'm investigating how one would go about setting up dual domain SAS with a D2600 and two identical HP cards for the following: P411, P421, P431, P441, P822 or the P841 I've tried searching but I can't seem to find any documentation that explains…
user1172468
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