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LSI SAS 9207-8i SGL Internal HBA Disk Controller = no TRIM?
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BobWya
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Joined: 12 Aug 2012
Posts: 228
Location: Cambridge,UK

PostPosted: Tue Dec 30, 2014 10:57 pm    Post subject: LSI SAS 9207-8i SGL Internal HBA Disk Controller = no TRIM? Reply with quote

Hi folks,

I recently upgraded my aging X58 motherboard with an LSI SAS/SATA HBA Controller (speed bump from 3G from the built-in Intel SATA controller to 6G).

It shows up as:
Code:
05:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
        Subsystem: LSI Logic / Symbios Logic Device 3020
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 256 bytes
        Interrupt: pin A routed to IRQ 26
        Region 0: I/O ports at c000 [size=256]
        Region 1: Memory at fbcf0000 (64-bit, non-prefetchable) [size=64K]
        Region 3: Memory at fbc80000 (64-bit, non-prefetchable) [size=256K]
        Expansion ROM at fbb00000 [disabled] [size=1M]
        Capabilities: [50] Power Management version 3
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [68] Express (v2) Endpoint, MSI 00
                DevCap: MaxPayload 4096 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
                DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+
                        RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset-
                        MaxPayload 128 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L0s, Exit Latency L0s <64ns, L1 <1us
                        ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 5GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Range BC, TimeoutDis+, LTR-, OBFF Not Supported
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
                LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
                         Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
                         Compliance De-emphasis: -6dB
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [d0] Vital Product Data
                Unknown small resource type 00, will not decode more.
        Capabilities: [a8] MSI: Enable- Count=1/1 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [c0] MSI-X: Enable+ Count=16 Masked-
                Vector table: BAR=1 offset=0000e000
                PBA: BAR=1 offset=0000f000
        Capabilities: [100 v2] Advanced Error Reporting
                UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
                CESta:  RxErr+ BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
                AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-
        Capabilities: [1e0 v1] #19
        Capabilities: [1c0 v1] Power Budgeting <?>
        Capabilities: [190 v1] #16
        Capabilities: [148 v1] Alternative Routing-ID Interpretation (ARI)
                ARICap: MFVC- ACS-, Next Function: 0
                ARICtl: MFVC- ACS-, Function Group: 0
        Kernel driver in use: mpt2sas
        Kernel modules: mpt2sas


Code:
lsmod | egrep "(ata|scsi|sas)"
mvsas                  60272  0
libsas                 72372  1 mvsas
libata                181518  3 ahci,libahci,libsas
mpt2sas               155413  18
raid_class             12788  1 mpt2sas
scsi_transport_sas     33468  3 mvsas,mpt2sas,libsas
scsi_mod              147543  8 scsi_transport_sas,mvsas,mpt2sas,libata,libsas,sd_mod,sr_mod,raid_class


I did some tests. All my Linux distros boot (Arch, Gentoo, SUSE Tumbleweed). Disk speed is substantially improved for my Samsung 830 SSDs (max read from ~270Mb/s to >500Mb/s).

The Samsung 830 SSDs I have (all 256Mb models) are up to date on the latest firmware:
Code:
=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     SAMSUNG SSD 830 Series
Serial Number:    S0WKNEAC300626
LU WWN Device Id: 5 002538 043584d30
Firmware Version: CXM03B1Q
User Capacity:    256,060,514,304 bytes [256 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 T13/2015-D revision 2
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Tue Dec 30 22:40:51 2014 GMT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled


Then I noticed that my discard flag (for my ext4 partitions) was being flagged as error during boot. This was the same regardless of (the Linux) distro.

Manually trying to TRIM my root FS (ext4) results in...
Code:
fstrim -v /
fstrim: /: the discard operation is not supported

Trim works fine with the built-in Marvel and Intel SATA Host Controller cards. The Samsung SSD's are being used as individual drives (no LVM, or RAID).

This is very annoying since, in all other respects it's a great card (e.g. suspend/resume support is perfect)... I thought TRIM pass through for SATA SSD's would be a given for a modern, 200.00 GBP PCIe 3.0 card that advertises Windows, Linux and BSD support. I even checked with Allan Jude (who co-presents the BSD Now! podcast) that this card was decent buy before crippling my wallet. :x

At present it looks like I'll end up having to pop the SSD's out of their hot-swap bays and hook them up to the Intel controller to TRIM them. Anyone got a better idea or suggestion? :cry:

Thanks
Bob
_________________
system: G751JT (ASUS-NotebookSKU); processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz; memory: 32GiB System Memory; display: GM204M [GeForce GTX 970M]; disk: 2048GB Samsung SSD 850;BD-CMB UJ172 S;1024GB Samsung SSD 850
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s4e8
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PostPosted: Wed Dec 31, 2014 3:46 am    Post subject: Reply with quote

ahci and mvsas(libsas based) expose sata protocol to kernel, but mpt2sas expose sas/scsi protocol to kernel. So the TRIM/DISCARD (scsi UNMAP, WRITE_SAME) functionality need to handled by HBA firmware. You need to upgrade firmware to support it.
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BobWya
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PostPosted: Wed Dec 31, 2014 3:04 pm    Post subject: Reply with quote

@s4e8

The Firmware updating utility - despite being impressive (I could flash the LSI HBA device straight from Linux, from a KDE graphical environment, with my root FS partition on a SSD connected directly to the LSI 9207-8i HBA!!) - sadly still did not resolve the issue. The latest 9207-8i MPTFW-20.00.00.00-IT Firmware still does not get me TRIM support.

I've started a Support Ticket with LSI as a result.

Thanks for the suggestion anyway. At least I've discovered the neat Management Utility LSI produces... 8)

Bob
_________________
system: G751JT (ASUS-NotebookSKU); processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz; memory: 32GiB System Memory; display: GM204M [GeForce GTX 970M]; disk: 2048GB Samsung SSD 850;BD-CMB UJ172 S;1024GB Samsung SSD 850
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s4e8
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Joined: 29 Jul 2006
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PostPosted: Wed Dec 31, 2014 3:55 pm    Post subject: Reply with quote

BobWya wrote:
@s4e8

The Firmware updating utility - despite being impressive (I could flash the LSI HBA device straight from Linux, from a KDE graphical environment, with my root FS partition on a SSD connected directly to the LSI 9207-8i HBA!!) - sadly still did not resolve the issue. The latest 9207-8i MPTFW-20.00.00.00-IT Firmware still does not get me TRIM support.

I've started a Support Ticket with LSI as a result.

Thanks for the suggestion anyway. At least I've discovered the neat Management Utility LSI produces... 8)

Bob

LSI firmware require SSD supports deterministic read after trim (read zero).
http://comments.gmane.org/gmane.linux.scsi/88189
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BobWya
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PostPosted: Wed Dec 31, 2014 4:32 pm    Post subject: Reply with quote

s4e8 wrote:

LSI firmware require SSD supports deterministic read after trim (read zero).
http://comments.gmane.org/gmane.linux.scsi/88189


Thanks... I guess!! So that means I'm screwed... 8O

Oh well. I just can't seem to win... I've got 2 door-stops now (a Marvel-based SAS Controller that doesn't support suspend/resume for Linux and has shit transfer speeds for SATA 6G)...
I had a feeling I should just have sucked it up and forked out for a brand new Intel X99 setup... :roll: :cry:


Bob
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system: G751JT (ASUS-NotebookSKU); processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz; memory: 32GiB System Memory; display: GM204M [GeForce GTX 970M]; disk: 2048GB Samsung SSD 850;BD-CMB UJ172 S;1024GB Samsung SSD 850
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