Weird behavior writing to SSD on 2013 MacBook
Allan Jude
allanjude at freebsd.org
Thu Feb 5 01:13:50 UTC 2015
On 2015-02-04 19:29, Lundberg, Johannes wrote:
> Hi
>
> I'm thought I was gonna do some test runs with HEAD on a 2013 Macbook Air
> and noticed some weird behavior regarding disk I/O.
>
> This happens both when doing portsnap extract and clone from git repository.
>
> For example portsnap extract, the extraction process (the output of it)
> suddenly stops, for seconds or maybe even minutes, quite many times during
> the whole extraction process.
> iostat reports ~200 MB/s on ada0 the whole time during freeze.
>
>
> pciconf:
>
> ahci0 at pci0:4:0:0: class=0x010601 card=0x91831b4b chip=0x91831b4b
> rev=0x14 hdr=0x00
> vendor = 'Marvell Technology Group Ltd.'
> class = mass storage
> subclass = SATA
>
>
> dmesg (relevant lines?):
>
> ahci0: <Marvell 88SS9183 AHCI SATA controller> port
> 0x1028-0x102f,0x1034-0x1037,0x1020-0x1027,0x1030-0x1033,0x1000-0x101f mem
> 0xb0700000-0xb07001ff at device 0.0 on pci4
> ahci0: AHCI v1.00 with 1 6Gbps ports, Port Multiplier not supported
> ahcich0: <AHCI channel> at channel 0 on ahci0
>
> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> ada0: <APPLE SSD SD0128F A222821> ATA-8 SATA 3.x device
> ada0: Serial Number 1325A5401681 \^T\^T\^T\^T\^T\^T\^T
> ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 512bytes)
> ada0: Command Queueing enabled
> ada0: 115712MB (236978176 512 byte sectors: 16H 63S/T 16383C)
> ada0: Previously was known as ad4
>
> GEOM: ada0: enabling Boot Camp
> GEOM: diskid/DISK-1325A5401681%20%14%14%14%14%14%14%14: enabling Boot Camp
>
>
> gpart:
>
> => 34 236978109 ada0 GPT (113G)
> 34 6 - free - (3.0K)
> 40 409600 1 efi (200M)
> 409640 174519128 2 apple-hfs (83G)
> 174928768 1269536 3 apple-boot (620M)
> 176198304 1376 - free - (688K)
> 176199680 29782016 4 linux-data (14G)
> 205981696 2097152 5 linux-swap (1.0G)
> 208078848 1600 6 efi (800K)
> 208080448 27261368 7 freebsd-ufs (13G)
> 235341816 1445888 8 freebsd-swap (706M)
> 236787704 190439 - free - (93M)
>
>
> One other weird thing is that FreeBSD does not show up in the refind boot
> menu by default, only OSX and Linux. I have to press ESC once to reload for
> FreeBSD boot option to show up.. Any clues? Is my partition configuration
> wrong in some way?
>
> Thanks!
> --
> Johannes Lundberg
> BRILLIANTSERVICE CO., LTD.
>
For the disk io bit, try running 'gstat' instead of iostat, and see what
it says.
--
Allan Jude
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 834 bytes
Desc: OpenPGP digital signature
URL: <http://lists.freebsd.org/pipermail/freebsd-current/attachments/20150204/90454ee2/attachment.sig>
More information about the freebsd-current
mailing list