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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3 answers
14k views

Are all SAS drives hot-swappable?

Can get a 300GB Cheetah 15K SAS 3.5 disk for quite a bit cheaper through another supplier vs. Dell's out-of-warranty depot (for an aging PowerEdge server). Specs are identical, wondering if there's ...
2 votes
0 answers
744 views

Supermicro server hangs on boot with disks in HBA

I have a "homemade" Supermicro server with an X9D board in an 836 chassis that has two SSDs with freenas installed. It has a pass-through backplane, with 4 SATA HDDs running via the Intel C606 ...
3 votes
0 answers
674 views

Controlling drive LEDs on a HP DL380e G8

Having discovered ledctl via Physically Identify the failed hard drive I've been trying to use it indicate a drive to pull from an HP DL380e G8 server running Proxmox, but ledctl locate=/dev/disk/by-...
2 votes
1 answer
188 views

HP DL380p 25 sff sas expander speed

on the HP DL380p 25 disk sff version whats the sff backplane and expander speed? Reading the specs i can assume its 12g so with a controller like p830 it should be able to work at full speed. anyone ...
1 vote
1 answer
327 views

Is the limitation of SATA attached drives on an LSI based SAS expander an ongoing issue?

In my research on developing a low-cost external drive bay for my server, I was presented with a critical issue in attaching commodity SATA drives through any SAS expander based on the LSI controller ...
4 votes
3 answers
810 views

SAS RAID5 Disk failure, replacement enclosure not matching

A SAS disk in RAID5 array failed yesterday and I'm about to replace it, however I noticed the front enclosure wasn't matching the rest of the disks. The array consists of 300GB 10K SAS disks with the ...
0 votes
0 answers
732 views

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 ~...
1 vote
0 answers
269 views

Multiple SAS inputs from single raid controller into expander backplane

Hello I have recently purchased a mixture of off-lease server equipment which I will be building a server for my office utilizing this equipment for business use. Some of the items I have purchased ...
4 votes
1 answer
14k views

HP ProLiant ML350e Gen8 v2 Not Detecting Hard Drives

I have tested several solutions but non of them cant detect my 2 hard drives (legacy mode , acpi and raid embended) I have a 2 Dell-Seagate SAS Cheetah 15k,7 hard drives (ST3300657SS) (they are not ...
3 votes
2 answers
2k views

Using an SAS Expander with a SAS Controller of a different brand

I'm planning on assembling a server, and I'm just wondering if a SAS expander by IBM (such as this one) would allow me to use the RAID and other features (Battery-backed write-back caching) of a SAS ...
0 votes
1 answer
361 views

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 ...
9 votes
5 answers
12k views

SAS or SATA for 3 TB drives?

We are looking to purchase new 3 TB enterprise-grade drives and can buy either SAS or SATA models. AFAIK, SAS generally gives better performance than SATA, but searching for benchmarks I found ...
1 vote
1 answer
562 views

NFS SATA vs SAS for VMware datastore? [closed]

Lately I have been seeing people online and their followers making NFS servers with SATA SSDs for VMware Datastores. This enraged me! SATA is half duplex and SAS is full. A 15k SAS at 6Gbs with a ...
5 votes
5 answers
5k views

Would using SAS disks instead of SATA disks make sense over NFS for a VMWare datastore?

We are deciding whether to use SATA or SAS aggregates on our Filer for our VMWare datastore. We will be using NFS to connect the VMWare hosts to storage. Doesn't seem to make sense to use SAS disks ...
7 votes
5 answers
35k views

Will any SAS drive work in a Dell PowerEdge server?

If I bought a Dell 2950 or 2650, for example, and it has no drives in it (from say an auction). Will any SAS drive I get work in it? I ask because they vary so much in price. Some drives are $150 ...
0 votes
1 answer
506 views

Why are SAS laptop drives not spinning up on Adaptec controller

Having used the first SCSI drive of 20MB on an Amiga computer, I am now using a Tyan server board with an Adaptec/Microsemi RAID 6805E SAS controller and two Seagate 15K Cheetah 300GB SAS drives. This ...
0 votes
1 answer
229 views

What SAS adapter is compatible with Supermicro X9DRD-iF motherboard? [closed]

Here is my motherboard https://www.supermicro.com/products/motherboard/Xeon/C600/X9DRD-iF.cfm I need a compatible adapter so I can connect 2 SAS drives to this motherboard as it does not have native ...
0 votes
1 answer
809 views

How can I connect an SAS drive to a server mobo without native SAS port

Here is my motherboard https://www.supermicro.com/products/motherboard/Xeon/C600/X9DRD-iF.cfm I don't see SAS listed which is why it's not reading, or because it isn't using an SAS cable. SATA is ...
6 votes
1 answer
18k views

What is a maximum useful length of a SATA/SAS cable?

The server in question is DELL PowerEDGE SC1435. I am thinking about buying a LSI 1068e based card with two internal SFF-8087 ports. I intend to use the machine with external multiple hard disk ...
1 vote
1 answer
1k views

Which SAS cable to connect an internal HP LTO-5 tape drive?

I've bought an internal HP Ultrium 3000 LTO 5 tape drive (Model 693416-001) without SAS connection cable. Being new to SAS I have discovered that there are loads of different types of cable, and I ...
0 votes
1 answer
634 views

How to configure HP Smart Array P822 controller with single SAS HDD

I have SAS Seagate Exos HDD and HP P822 Smart Array controller with 2GB cache with battery backup. I don't want to create any arrays, this is supposed to be single storage HDD in my workstation. All ...
1 vote
2 answers
1k views

MegaRAID SAS 8208XLP

I'm just wondering whether anyone knows if I can use a Debian distro with the MegaRAID SAS 8208XLP controller. Currently at the moment LSI only supply drivers/support for RHEL/CentOS but I was ...
1 vote
0 answers
97 views

Mount both sides of ZFS mirror to different mountpoints (AKA Glusterfs is choking)

We have two SuperStorage Server 6049PE1CR36L each with 24 - 4TB disks. At the moment we are running Ubuntu 18.04 but this is negotiable if it helps solve our problem. We are using Ext4 as the OS ...
7 votes
3 answers
15k views

SAS / SATA max number of connected disks vs performance

I would like to understand following things: When I have a motherboard with SATA 6Gb/s and 8 ports, does it mean that every single port is able to provide 6Gb/s speed to disk that is connected over ...
3 votes
1 answer
656 views

Cable for SFF-8087 to SAS drives

I have a bunch of 3.5" SAS hard drives that I removed from one of my raid enclosures that has a backplane and want to reuse those drives with a Perc H700 controller in a PC that is a full tower system ...
0 votes
1 answer
1k views

New RAID10 4x 12TB array, long resync time

I just got a CENTOS new machine setup. It has 2x SSD drives for linux, and 4x 12TB SAS drives for extra storage. I setup a software RAID10 array on the 4x 12TB drives, file system ext4. Obviously it ...
2 votes
1 answer
567 views

12G SAS Expander with 6G disks limiting speed?

I'm building a server with 24 SATA III disks connected to a Chenbro 12G SAS expander on a 12G SAS HBA (LSI 9300) with a single SFF-8643 cable. Aggregate write speed is slower than I hoped for, and I'...
1 vote
1 answer
11k views

Connecting a Direct Attached Storage array to multiple servers

Is it possible to connect multiple servers to the same Direct Attached Storage array, something like the Dell MD1200 or MD1220? I see from the specs that each one of these arrays supports two ...
0 votes
1 answer
50 views

Server fails on reboot after updates

Okay - this is an HP ML340 G9 one year out of warranty. Last weekend I decided to allow Windows (2012 Essentials) to update. On restart, server dead/no boot. Storage manager says no drives (there ...
1 vote
1 answer
3k views

Dual R710/MD3400 SAS Connectivity

We've recently purchased 2 x Dell R710s and 2 x Dell MD3400 SAS storage devices with 12 2tb drives in each with 2 dual SAS connections from each server to 2 dual raid controllers on both MD3400s (I've ...
0 votes
0 answers
45 views

2 Volume RAID 10 on a single RAID controller

Motherboards Supermicro X10DRH-CT Onboard Raid Broadcom Mega Raid SLI 3108, Motherboard has 2 mini SAS port for an other 4 SAS Drives. Question, Can I create Second Raid 10 Volume without interfering ...
6 votes
2 answers
3k views

HP ProLiant DL380 G7 LFF - Is every SAS HDD compatible?

I am just starting to get into server hardware, so please bear with me. I bought a HP ProLiant DL380 Generation 7 with a LFF drive cage and I do not know which SAS drives are actually compatible. ...
0 votes
1 answer
151 views

Veeam Hyper-V Cluster Off-Host Backup Proxy

I'm creating a new HPE configuration for a Hyper-V cluster. Need also to consider Veeam and Off-Host Backup Proxy. This might be a silly question, but considering HPE MSA 2052, does it make any ...
0 votes
1 answer
315 views

Possible to use SAS-2 and SAS-3 HBA in the same system?

I'm wondering if it is possible to use a SAS-2 HBA in a "SAS-3" system. I have a Supermicro X11DPH-T and have attempted to install an LSI 9201-16e. From what I understood (which may be wrong), a ...
0 votes
1 answer
272 views

How to disable redundant path warning for a d2600 with 12 HP SATA drives?

Have a HP p822 RAID controller with FirmWare 8.32 cabled to a HPE d2600 with 12 x 4TB SATA drives in RAID60. These are not dual-port SAS drives, but 4TB SATA drives so there is only one pathway to ...
4 votes
1 answer
883 views

If I connect a SATA3 6Gbps SSD to a SAS2 6Gbps port using a breakout cable, will I get SATA3 speeds?

I have 2 SATA3 SSDs in my server, which are currently connected to SATA2 ports. If I wanted to get SATA3 speeds out of them instead, could I buy a SAS2 HBA and use an SFF-8087 to SATA breakout cable ...
4 votes
1 answer
183 views

How does HP DL380e G8 support 12 sas disks

I have an HP DL380e Gen 8. it has 12 3.5/LFF slots on the front. The backplane has two SFF8087 cables to the HBA. I thought that SFF8087 could only carry 4 SAS channels, so how do 12 disks work over 2 ...
1 vote
1 answer
551 views

Can SAS Expander's OUT port be used as IN?

Assuming there is only one HBA and no failover intended. The card is an HP 468405-001 or 487738-001 with 6x Mini-SAS OUT and 2x IN internal. Its 1x external connector is dubbed 'HPE Tape.' If I ...
2 votes
0 answers
2k views

what does UNCONFIGURED BAD mean

have a few SAS ssd's, the $4000 kind {manufacturer name withheld}. I have had two now go to unconfigured bad after 1-2 hours of only powered on use, such that I am skeptical that the drive is not ...
3 votes
0 answers
509 views

SAS Expanders and Hp Smart Array HBA mode

I've recently purchased an HP DL360p G8 with a Smart Array P420i 1GB storage controller. As I'm using FreeNas, I've switched the controler to HBA mode. I was planning to buy an HP SAS expander, this ...
3 votes
1 answer
1k views

mpt3sas_scsih_issue_tm: timeout when doing ZFS scrub

Overview We are currently doing a scrub on a ZFS pool with 12 RAID-Z1 vdevs, and each vdev has 12 drives. Each vdev corresponds to an enclosure. The hardware is a Dell PowerEdge 730xd with two Dell ...
12 votes
3 answers
99k views

HDD: performance differences between 7.2k SATA and 15k SAS

What is the rule of thumb in performance characteristics and differences between 7200rpm (SATA/SAS) and 15000rpm (SAS) hard disc drives of the same generation?
3 votes
1 answer
868 views

Mixing 15K rpm SAS with 7.2K rpm SATA on Dell PowerEdge R610

Is it possible to mix 15K rpm SAS with 7.2K rpm SATA on Dell PowerEdge R610 on the same RAID configuration (Raid 5)? Is the SAS' speed going to drop to follow the lowest speed (the SATA speed)? and ...
3 votes
2 answers
3k views

Are SAS Drives really worth their money and are they much better than todays latest SATA?

The price difference between SATA and SAS is really very big. Of course I understood, that SAS drives have their advantages, but does this really legitimate a price difference of 100% or more? Should ...
4 votes
1 answer
1k views

HP D2700 configuration

I have a HP D2700 connected to a dl360G7 with a p812 controller using one SAS cable. The storage enclosure houses 23 SAS 450GB disks with one spare for a raid6 array. It serves as an nfs datastore for ...
-3 votes
1 answer
35 views

New to servers, just recieved an intransa va expandr

Intransa VA-EXPANDR 12 2 TB Disk array question. I received this 12 disk array along with a dell poweredge 2850. I would like to set up a RAID but i'm having trouble understanding how to hook up to ...
8 votes
4 answers
18k views

HP D2700 enclosure and SSDs. Will any SSD work?

I've got an HP D2700 enclosure that I'm looking to shove some 2.5" SSD drives in. Looking at the prices of HP's SSD drives vs something like an Intel 710 and even something less 'enterprisey', there's ...
1 vote
0 answers
1k views

MegaRAID SAS Phy is bad on enclosure, no SAS address

I've inherited a MegaRAID SAS 24 bay RAID, that is also attached to two additional enclosures ( one 24 bay, and one 12 bay). I attempted to load 6 new drives into 6 consecutive empty drive bays on ...
3 votes
1 answer
2k views

Mini-SAS Connector Puzzle

Can anyone clearly define the difference between the Mini-SAS HD SFF-8644 and SFF-8614 connectors please? The SFF-8644 seems to be the more widely recognised 'male' connector but SFF-8614 seems also ...
2 votes
0 answers
1k views

Changing SATA/SAS and SSD/HDD mix capabilities on a raid controller

We are currently facing the challenge of replacing disks in a raid 1 configuration of a standalone server. The server is quiet old and uses 10k SAS HDD drives together with a Fujitsu D2616 (based on ...

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