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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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Multiple MD1200s, Multiple External Connections Increase Throughput?

I am looking at a setup with two Dell MD1200s loaded with 6Gbs SATA drives. What I am trying to figure out is if a single card with two external inputs would be a bottleneck, or if it would be better to have two cards and connect one MD1200 to each…
Dizzy49
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How to replace old drives in RAID 1 using WebBIOS?

Working with Sun Fire X4170 Server. Now it have three RAIDs, all is on level 1. Every logical volume (every RAID) contains one Proxmox VM, idk does it matter in my case. The first RAID recognizes that there is no second drive, while the second RAID…
Everblane
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HBA in Linux storage server - best practices for many HDDs

I will launch and administrate a Linux storage server: 4U, HBA LSI 9500-16i Tri-Mode, hybrid. It wiill possess 12 positions for the HDDs/SSDs in the back, 24 positions in front. There is an expander that allows to combine NVMe/SAS. My question is…
michalt
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Swapped in new SAS drive, RAID still shows degraded, what next?

I need to replace a failed RAID 1 drive on an ancient PowerEdge 2950. The old drive was throwing amber warning lights with the LED showing error 1810. I have a new SAS drive installed and the controller appears to see it. There are two solid green…
a coder
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SAS drives not detected in JBOD's

I have two bnib Supermicro SYS-937R-E2JB JBOD connected with SFF8088 cables to my LSI 9200-8e HBA in my Dell T5810 workstation running Ubuntu Desktop 20.04. Neither the Seagate 12TB SAS or the Whitelabel 10TB SAS drives are recognized or detected. …
Murrmurr
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Can you use a SAS fan-out cable to connect more drives?

I bought a Broadcom 9400-16e HBA that has four external ports. I was hoping that by using four mini-SAS cables that fan-out to two, I could double the number of connected drives from 16 to 32. However, each fan-out cable can only detect four drives,…
Jorsher
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Can Windows Server 2022 read passed through SAS drives in a JBOD configuration?

I recently bought a simple RAID controller card (LSI-9210-8i), and flashed it to IT mode. I also bought a single SAS drive of 3TB. I formatted the drive in the LSI Card's BIOS, and have checked the drive in MEGARAID, and it is reading as…
Tyler
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Disk access or VM slowdown, how to monitor

We have a dell host running several VMs that are all located on a dell power vault. Users have complained of intermittent slowdowns (like a long time to ls a folder, or taking longer to respond once we log in). They ALWAYS blame the network, but…
Codejoy
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Dell R640 onboard SAS and SATA connectors

Dell R640 / R740 system boards have seven or eight onboard SATA and SAS connectors, presumably usable for connecting HDDs & SSDs without a PERC controller. In the "System board jumpers and connectors" diagram of the Installation and Service Manual,…
Dave Burton
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Supermicro backplane diagnostics

I have three supermicro servers, 2x 3U chassis with X8DTE motherboard and SAS-836TQ backplanes and 1x 1U chassis with X9DRW-iF with SAS-815TQ backplane. 1 of the 3U backplanes only recognizes 12 out of 16 drives (I've talked about this issue here),…
Pieter Helsen
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SuperMicro 16-Bay chassis only recognizes 12 drives

I recently purchased two refurbished Supermicro SC836TQ (3U, 16bay) chassis with SAS backplanes (Standard SAS836-TQ planes). One works perfectly fine, but the other fails to recognize/initialize any disks installed in the right-most…
Pieter Helsen
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How to remove all multipath references on server, to survive reboot"

I have a few enclosures running on Ubuntu server that I am not creating as raid arrays. They are all individual xfs single partioned single drives. I would only like to see the drive itself show up in fdisk / lsblk etc. /dev/sddf1:…
ril3y
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Can you run SAS drive from SAS backplane to SATA on mobo?

Have an SAS drive plugged into SAS port on the backplane, and it is connected to SATA on the motherboard. Is it possible to use it this way? It is a testing server for cloning another SSD.
serveraddict
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SAS Drive Upgrade

We have a HP Proliant server with a RAID 1 disk ( 2x 146Gb 15K SAS) configuration. The logical drive is full and I would like to expand it. I've purchased 2 x 300GB 15K SAS to replace the 146K Operating System: Windows Server 2012 Any advice on…
yvalcorp
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Dell T610, Perc H700, Netapp Savvio 600G SAS drives - unable to create any RAID

Trying to create a new Raid 10 VD using 4 x Netapp Savvio 10K 600G SAS drives (2.5) fails. After creation the vd/drives enter into failed state (immediately), and I am unable to initialize the VD. I've tried clearing the config many times, didn't…
Michael Mussulis
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